Oasis Academy South Bank



Year 10 Combined Science - FoundationMock Exam RevisionPaper 1Instead of a year 10 end of year exam this year, you will be sitting a science mock paper.This paper will include all topics learnt in both year 9 and year 10.This revision homework must be completed weekly.The format of each homework is the same:Section 1: 3 x look, cover, write, check for 10 knowledge questions.Each set must have a title and have a number (1,2 or 3)>An example of what this looks like is shown below:Section 2: answer the mastery matrix statements and self-assess using the knowledge and/or your revision guideSection 3: answer the exam questions and self-assess using the mark scheme Revision Homework 1: BiologySection 1: KnowledgeTopic:Transport in cells (diffusion, active transport and osmosis) (B.19)1Substances moving from a high concentration to a low concentration is called…Diffusion2One example of diffusion in humans is:CO2 + O2 in gas exchange3Three factors that affect the rate of diffusion are:Concentration gradientTemperaturesurface area of the membrane4How is the small intestine adapted for exchanging materials?Villi for large S.A. villi one cell thick good blood supply5How is the lungs adapted for exchanging materials?Alveoli large surface area: volume ratiosurface is moistgood blood supply6How is the roots adapted for exchanging materials?Large SA to volume ratio lots of mitochondria for respiration 7Water moves from a dilute to concentrated solution across a partially permeable membrane via...Osmosis8Pure water will move into a potato because ofOsmosis9When a substance moves against the concentration gradient, it is called..Active transport10Active transport requires ________ from _________.energy respirationSection 2: Mastery matrix statements to be answered using your revision guide and knowledge.Self-assess using revision guide and knowledgeDefine ‘diffusion’ and give examples of diffusion in plants and animals (gas exchange and urea in the kidney)Explain how different factors affect the rate of diffusion (concentration, surface area, temperature)Explain adaptations for exchange materials in: small intestines, lungs, gills, roots and leavesDescribe the process of osmosisCompare diffusion, osmosis and active transportSection 3: Exam questionsQ1.Substances can move into cells and out of cells.(a) ????Draw a ring around the correct answer to complete each sentence.??active transport.Water moves into cells and out of cells byosmosis.?reabsorption.??freely permeable?The water moves through anon-permeablemembrane.?partially permeable?(2)(b) ????Students put plant cells into two different strengths of sugar solutions, A and B.The diagram below shows what the cells looked like after 1 hour.?Cell insugar solution A(after 1 hour)?Cell insugar solution B(after 1 hour)(i)??????Describe two ways in which the cell in sugar solution B is different from the cell in sugar solution A.1. __________________________________________________________________________________________________________________________2. __________________________________________________________________________________________________________________________(2)(ii)?????A student put red blood cells into water.Suggest what would happen to the cells.__________________________________________________________________________________________________________________________________________________________________________________________(1)(c) ????In the human body, glucose is absorbed into the blood from the small intestine.The small intestine contains many villi. Which two of the following help the absorption of glucose in the small intestine? Tick () two boxes.Villi have a cell wall.Villi are covered in thick mucus.Villi give the small intestine a large surface area.Villi have many blood capillaries.(2)(Total 7 marks)Q2. Substances can move into and out of cells.(a)?????(i)????? How does oxygen move into and out of cells? Draw a ring around one answer.?diffusiondigestionphotosynthesis(1)(ii)?????Diagram 1 shows the percentage concentration of oxygen in three cells, A, B and C.?Oxygen can move from cell to cell.Into which cell, A, B or C, will oxygen move the fastest????????????(1)(b)?????(i)????? How does water move into and out of cells? Draw a ring around one answer.?breathingosmosisrespiration(1)(ii)?????Differences in the concentration of sugars in cells cause water to move into or out of cells at different rates. Diagram 2 shows three different cells, P, Q and R. The information shows the percentage concentration of sugar solution in cells P, Q and R.?Water can move from cell to cell.Into which cell, P, Q or R, will water move the fastest????????????(1) Mark schemesQ1.(a)???? osmosis1partially permeable1(b)???? (i)??????any two from:allow correct answers in terms of A?????????vacuole is small(er)?????????cytoplasm has shrunkallow cytoplasm is smaller?????????gap between cytoplasm and cell wall?????????cell wall curves inwardsallow cell B is flaccid or cell A is turgid?????????the (cell) membrane has moved away from the wall2(ii)?????any one from:?????????water will move / diffuse in?????????(cells) will swell?????????(cells) will burstignore turgid1(c)???? villi give the small intestines a large surface area1villi have many blood capillaries1[7]Q2.(a)????? (i)?????diffusion1(ii)?????A1(b)?????(i)????? osmosis1(ii)?????R1[4]Revision Homework 2: BiologySection 1: KnowledgeTopic:Developing new medicines (B.10)1What is used to test drugs during preclinical testing?Cells, tissues & live animals2Who are medicines tested on in stage 1 of clinical trials?Healthy volunteers (low doses - test for toxicity)3Who are medicines tested on in stage 2 of clinical trials?Patient volunteers (low doses - test for efficacy & dose)4What is a double blind trial?Neither experimenter or patient knows if they are taking medicine or placebo5What is a placebo?A substance that contains no medicine (a control)6What is the name for the injection given to patients to prevent them from catching an infectious disease?Vaccination7Describe step 1 of vaccinations1) small quantity of dead/inactive pathogen8Describe step 2 of vaccinations2) white blood cells produce correct antibody (slowly)9Describe step 3 of vaccinations3) pathogen enters body & WBC produce correct antibodies (quickly)10State two benefits of vaccinationPrevent illness in an individual & prevent spread to othersSection 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeExplain how preclinical and clinical trials are used to test new drugs (including tests for safety, effectiveness, toxicity and dosage)Describe how vaccinations cause a person to become immune from a diseaseSection 3: Exam questionsQ1. A chicken pox vaccination involves two injections.The graph below shows how the concentration of antibodies in a child’s bloodstream changes.?(c)??Suggest on what day the second injection was given. Day = ____________________(1)(d)??On which day is the child’s ability to defend against chickenpox at its peak? Day = ____________________(1)Children can only have the chickenpox vaccination if their parents pay for the vaccine.Some people think the vaccination should be free to all children.(e)??If more people were vaccinated the number of children getting chickenpox would decrease.What are two possible reasons for this decrease?Tick two boxes.?Drugs to treat chickenpox are no longer effectiveChildren are less likely to come into contact with someone with the diseaseMore people will have the correct antibodiesPeople may catch the disease from the vaccinationPeople may have a weakened immune system(2)(f)??The government needs to decide whether to make the chickenpox vaccination free to all children.Suggest two factors the government should consider when making this decision.1. ____________________________________________________________________________________________________________________________________2. ____________________________________________________________________________________________________________________________________(2)Q2. Pathogens are microorganisms that cause infectious diseases.(a)????The graph shows the percentage of children under 5 years old who died from infectious diseases, in the UK, in four different years.?(i)??????Between 1750 and 1850 vaccinations were also developed.What is in a vaccine??Tick (?) one box.?large amounts of dead pathogenslarge amounts of live pathogenssmall amounts of dead pathogens(1)(ii)??????The advances in medicine had an effect on death rate.Describe the effect these advances had between 1750 and 1850.To gain full marks you should include data from the graph above.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________(2)Q3. (b) ????A flu vaccine is offered to people with a high risk of having a severe illness if they are infected by the flu virus.What does a flu vaccine contain?Tick () one box.?Inactive antibodiesInactive virusesWhite blood cells(1)Mark schemesQ1.allow any answer in range 55?591(d)??85allow any answer in range 84?861(e)??children are less likely to come into contact with someone with the disease1more people will have the correct antibodies1(f)??any two from:????cost (to the NHS / government)????money saved through not treating people with chickenpox????how effective the vaccine is????severity of the disease????less effect of disease on people with weaker immune systems / elderly / HIV or on unborn babies2[8]Q2.(a)?????(i)??????small amounts of dead pathogens1(ii)??????decrease1by 60 (%)allow from 70(%) to 10(%)allow other correct data treatment1Q3. (b) ????Inactive viruses1Revision Homework 3: BiologySection 1: KnowledgeTopic:The Heart (B.15)1Which type of vessel leaves the heart?Arteries2Which type of vessel enters the heart?Veins3What is the name of the 4 chambers of the heart?Top: Left/right AtriumBottom: Left/right ventricle4What is the name of the blood vessel that enters the heart from the body?Vena Cava5What is the name of the blood vessel that enters the heart from the lungs?Pulmonary vein6What is the name of the blood vessel that goes to the lungs from the heart?Pulmonary artery7What is the name of the blood vessel that goes from the heart to the rest of your body?Aorta8Which side of the heart is thicker?Left9Which side of the heart pumps oxygenated blood out of it and which side pumps deoxygenated?Oxygenated = LeftDeoxygenated = Right10What is the name for removing a heart from one person and placing it into another person?TransplantSection 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeDescribe the structure and function of the human heartDescribe the roles of the four blood vessels associated with the heartSection 3: Exam questions:Q1. The heart is part of the circulatory system.(a)?????(i)??????Name one substance transported by the blood in the circulatory system.______________________________________________________________(1)(ii)?????What is the main type of tissue in the heart wall?______________________________________________________________(1)(b)?????Figure 1 shows the human heart.?(i)??????Which blood vessel, A, B or C, takes blood to the lungs??????????(1)(ii)?????Name parts D and E shown in Figure 1.D _______________________________________E _______________________________________(2)(c)?????Figure 2 shows three types of blood vessel, F, G and H.?(i)??????What type of blood vessel is F??Tick (?) one box.?an arterya capillarya vein(1)Q2. Diagram 1 shows a section through the heart.Diagram 1?(a)?????Use words from the box to label parts A, B, C and D.?arteryatriumcapillaryplateletveinventricle(4)Q3. Complete each sentence about the heart by choosing the correct words from the box.?????????? A ventricle fills with blood by the contraction of _________________________ .????????? When a ventricle contracts, blood is forced into __________________________ .????????? When a ventricle relaxes, the backflow of blood into it is prevented by the closing of????????? _________________________ .(Total 3 marks)Mark schemesQ1. (a)?????(i)?????any one from:?????????glucose?????????oxygen?????????carbon dioxide?????????urea?????????waterallow hormonesallow named example of a product of digestion1(ii)?????(cardiac) muscleallow muscular1(b)?????(i)??????B1(ii)?????D atrium / atriaignore references to left or right1E ventricle(s)ignore references to left or right1(c)?????(i)??????a vein1Q2. (a)???? A arteryallow aorta1B ventricleignore references to left and right1C atriumignore references to left and rightallow atria1D veinallow vena cava1Q3. an atrium1????????? an artery1????????? a semi-lunar valve1Revision Homework 4: ChemistrySection 1: KnowledgeTopic:Structure of an atom (C.5)1What is the charge, relative size and location of a proton?Charge: 1+, Size = 1, Location = Nucleus2What is the charge, relative size and location of a neutron?Charge: 0, Size = 1, Location = Nucleus3What is the charge, relative size and location of an electron?Charge: -1, Size = 1/2000, Location = Shells4What is the radius of an atom? 0.1 nm (1 x 10 -10m)5What is the radius of a nucleus?1 x 10 -14m6Define "atomic number"No. of protons in an atom7Define "atomic mass number"Sum of protons and neutrons in an atom8Define isotope?Atoms of the same element that have the same number of protons but different numbers of neutrons9Describe Thompson's 'Plum Pudding' model of an atom.Ball of positive charge with electrons embedded throughout10Describe Rutherford's model of the atom1) Mostly empty space 2) dense, positive mass in the centre (the nucleus),Section 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeDescribe the plum pudding model of the atomDescribe the current (nuclear) model of the atom giving the relative charge and mass of the subatomic particlesRecall the radius of an atom and it’s nucleusCalculate protons, neutrons and electrons for an atom linking to mass and atomic numberSection 3: Exam questions Q1. The table below shows the relative mass and charge of the particles in an atom.?Name of particleRelative massChargeproton1+1neutron??electronvery small?(a)??Complete the table above.(3)(b)??The diagram below represents a lithium atom.?Give the number of protons, neutrons and electrons in the lithium atom shown in the diagram above.Number of protons??_________________Number of neutrons??_________________Number of electrons??_________________(3)(c)??Scientific models of the atom have changed over time.Draw one line from each description of the atomic model to the stage in the development of the atomic model.?Description of atomic model?Stage in the development of the atomic model???Dalton atomsA ball of positive charge with electrons embedded in it????Neutrons discovered???Nucleus of atoms discoveredSpherical atoms????Plum pudding model(2)(Total 8 marks)Q2.An argon atom can be represented as (a)??What does the number 40 represent in ?______________________________________________________________________________________________________________________________________(1)(b)??How many protons does this atom of argon have?Tick one box.?18224058(1)(c)??How many neutrons does this atom of argon have?Tick one box.?18224058(1)Q3.(a)???? Figure 1 shows an atom of element G.Figure 1?Draw a ring around the correct answer to complete each sentence.(i)??????Label A showsan electron????????????????an ion????????????????a nucleus(1)(ii)?????The particle labelled B isan isotope????????????????a molecule????????????????a neutron(1)(iii)????The mass number of element G is5????????????????6????????????????11(1)(iv)????Use the periodic table to identify element G.Element G isboron????????????????carbon????????????????sodium(1)Mark schemesQ1.(a)name of particlerelative masscharge?proton(1)(+1)?neutron101 + 1electron(very small)?11allow words instead of numbersallow neutral or no charge for the neutron(b)??(protons) 31(neutrons) 41(electrons) 31allow words instead of numbers(c)?11[8]Q2.(a)??the mass numberornumber of protons and neutronsignore (relative) atomic mass1(b)??181(c)??221Q3.(a)???? (i)??????an electron1(ii)?????a neutron1(iii)????111(iv)????boron1Revision Homework 5: ChemistrySection 1: KnowledgeTopic:Types of bonding (C.7)1Which type of bonding occurs between metals and non-metals?Ionic2Which type of bonding occurs between non-metals?Covalent3Which type of bonding occurs between metals?Metallic4When electrons leave the shells of an atom, they are said to be ……?Delocalised5Which type of ions are formed by metals?Positive ions6Which type of ions are formed by non-metals?Negative ions7Describe what happens in ionic bondingElectrons are transferred from a metal atom to a non-metal atom = strong electrostatic attraction between oppositely charged ions8Describe what happens in covalent bondingElectrons are shared between atoms = strong electrostatic attraction between electrons and nucleus9Describe what happens in metallic bondingElectrons become delocalised creating a sea of negative charge = strong electrostatic attraction with positive metal ions& sea of delocalised electrons10Why do noble gases not form compounds?Because they already have a full outer shell of electronsSection 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeDescribe the structure and properties of giant ionic structuresLink the structure of giant ionic structures to its propertiesDescribe the structure and properties of simple covalent structuresDescribe the structure and properties of giant covalent structures (including diamond, graphite and silica)Section 3: Exam questions Q1. The structures of four substances, A, B, C and D, are represented in Figure 1.?(a)???? Use the correct letter, A, B, C or D, to answer each question.?(i)Which substance is a gas?(1)?(ii)Which substance is a liquid?(1)?(iii)Which substance is an element?(1)?(iv)Which substance is made of ions?(1)(b)???? Figure 2 shows the bonding in substance C.?(i)??????What is the formula of substance C?Draw a ring around the correct answer.?SO2SO2S2O(1)(ii)?????Use the correct answer from the box to complete the sentence.?delocalisedsharedtransferredWhen a sulfur atom and an oxygen atom bond to produce substance C,electrons are _____________________________________________(1)(iii)????What is the type of bonding in substance C?Draw a ring around the correct answer.?covalentionicmetallic(1)(Total 7 marks)Q2. The diagram shows a small part of the structure of silicon dioxide.?(a) ????Use the diagram above to answer the question.Draw a ring around the correct answer to complete each sentence.??two?In silicon dioxide, each silicon atom is bonded withthreeoxygen atoms.?four???ionic.The bonds in silicon dioxide arecovalent.?metallic.(2)Q3. This question is about lithium and sodium.(a) ????Use the Chemistry Data Sheet to help you to answer this question.In which group of the periodic table are lithium and sodium????????? Group ?(1)(b) ????A lithium atom can be represented as ?The diagram represents the lithium atom.?(i)??????Some particles in the nucleus have a positive charge.What is the name of these particles?___________________________________(1)(ii)?????Some particles in the nucleus have no charge.What is the name of these particles?____________________________________(1)(iii)????Use the correct answer from the box to complete the sentence.?347The mass number of this atom of lithium is ?(1)(c) ????Sodium reacts with chlorine to produce sodium chloride.sodium ???? + ???? chlorine ???? ???? sodium chlorideThe diagram shows how the reaction happens.Only the outer electrons are shown.?Draw a ring around the correct answer to complete each sentence.??gaining?(i)?????A sodium atom changes into a sodium ion bylosingan electron.?sharing?(1)??a negative?(ii)?????A sodium ion hasnocharge.?a positive?(1)(iii)????The ions in sodium chloride are held together by??covalent?strongelectrostaticforces.?magnetic?(1)(d) ????Sodium chloride is an ionic compound.Tick () two properties of ionic compounds.?PropertyTick ()Do not dissolve in water?High melting points?Low boiling points?Strong bonds?(2)Mark schemesQ1.(a)???? (i)??????C1(ii)?????B1(iii)????A1(iv)????D1(b)???? (i)??????SO21(ii)?????shared1(iii)????covalent1[7]Q2.(a)????four1covalent1Q3.(a)????1 / one1(b)???? (i)??????protons1(ii)?????neutrons1(iii)????71(c)???? (i)??????losing1(ii)?????a positive1(iii)????electrostatic1(d) ????high melting points1strong bonds1Revision Homework 6: ChemistrySection 1: KnowledgeTopic:Reversible reactions and low grade copper ores (C.18)1What is a reversible reaction?A reaction that can go both forwards (to form the products) and backwards (to form the reactants)2Give two examples of reversible reactionsAmmonium chloride ? ammonia + hydrogen chlorideHydrated copper sulphate (blue) ? anhydrous copper sulphate (white) + water3Is ammonium chloride -> ammonia + hydrogen chloride an endothermic or exothermic reaction?Endothermic4What is it called when the forward and reverse reactions occur at exactly the same rate?Equilibrium5Which 3 factors affect the position of equilibrium?Pressure (gases), temperature, concentration6What is a closed system?A reaction (system) where no reactants are added or products removed.7What is the symbol for a reversible reaction? ? 8What is the general equation for a reversible reaction?A + B ? C + DSection 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeUse the appropriate symbol to denote a reversible reactionExplain energy changes in reversible reactions (ammonium chloride and hydrated copper sulphate)Explain what is meant by the term ‘equilibrium’Section 3: Exam questions Q1. (c)??Nitrogen is used to make ammonia.The word equation for the reaction is:nitrogen + hydrogen ______________ ammoniaWrite the correct symbol in the equation to show that it is a reversible reaction.(1)(d)??A reversible reaction can reach plete the sentence.Equilibrium is reached when the forward reaction and the reverse reaction happenat the same ____________________ .(1)Q2. This question is about ammonia (NH3) and compounds of ammonia.(a)???? Which diagram shows the arrangement of outer shell electrons in a molecule of ammonia?Tick one box.(1)(b)???? What type of bonding is present in ammonia?Tick one box.?CovalentIonicMetallic(1)Ammonia is produced by reacting nitrogen and hydrogen.(c)???? Balance the equation for the reaction.N2 + 3H2 ? ___NH3(1)(d)???? What does the sign ? represent?___________________________________________________________________(1)Q3. Some students investigated reactions to produce magnesium. (ii)?????Draw a ring around the relative mass of chlorine in MgCl2?7195119(1)(d) ????Magnesium is also produced from the reaction of magnesium oxide with silicon.(i)??????The equation for the reaction is:2 MgO(s)????+????Si(s)????????SiO2(s)????+????2 Mg(s)What is the meaning of this symbol ?Draw a ring around the correct answer.?neutralisation reactionprecipitation reactionreversible reaction(1)(ii)?????The forward reaction is endothermic.Draw a ring around the correct answer to complete the sentence.?In an endothermic reaction the temperature of the surroundingsdecreases.increases.stays the same.(1)(Total 12 marks)Mark schemesQ1. (c)???ignore any extra words1(d)??rateallow speedallow pacedo not accept timedo not accept amountdo not accept leveldo not accept point1Q2.(a)???? A1(b)???? covalent1(c)???? N2 + 3H2 ? 2NH3allow correct multiples1(d)???? reversible (reaction)1Q3. (ii)?????711(d)???? (i)??????reversible reaction1(ii)?????decreases1[12]Revision Homework 7: PhysicsSection 1: KnowledgeTopic:Series and parallel circuits (P.30)1Do series circuits have one loop or multiple loops?1 loop2Do parallel circuits have one loop or multiple loops?Multiple loops3Describe the distribution of current in a series circuitIt is the same everywhere4Describe the distribution of potential difference in a series circuitSplit between components5Describe the distribution of current in a parallel circuitSplit up in the different loops6Describe the distribution of potential difference in a parallel circuitThe same in each loop7Name the component used to measure current Ammeter8Name the component used to measure voltage Voltmeter9State the equation for calculating resistance in a series circuitRtotal = R1 +R210How do you calculate total resistance in a series circuit?Sum the resistance of each componentSection 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeCompare and contrast series and parallel circuits in terms of current and potential difference.Calculate resistance in series circuits and describe resistance in parallel circuits. Section 3: Exam questions Q1. Figure 2 shows four different arrangements of resistors.Figure 2(e)???? Two of the arrangements are in series and two are in parallel. Describe the difference between a series and a parallel arrangement.____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________(2)(f)????? Which arrangement has a resistance of 10 ??Tick one box.?PQRS(1)(g)???? Which arrangement has the highest resistance?Tick one box.?PQRS(1)ponents can be connected in electrical circuits in different ways. Figure 1 shows a parallel circuit.Figure 1(c)???? Calculate the current measured by ammeter A2.Current = ____________________ A(1)(d)???? The circuit is connected for 300 sThe total current in the circuit stays at 0.56 ACalculate the total charge flow.Use the equation:charge flow = current × time____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Charge flow = ____________________ C(2)(e)???? The potential difference supplied by the battery is 4.5 VCalculate the total energy transferred in 300 sUse the equation:energy transferred = charge flow × potential differenceUse your answer to part (d).____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Energy transferred = ____________________ J(2)(f)????? Figure 2 shows a series circuit.Figure 2Resistor R2 breaks.What happens to the reading on the ammeter?___________________________________________________________________(1)(g)???? Figure 3 shows a parallel circuit.Figure 3Resistor R3 breaks.What happens to the readings on the ammeter?Ammeter A1 _________________________________________________________Ammeter A2 _________________________________________________________(2)Q3. (c)???? Figure 2 shows how two lamps may be connected in series or in parallel to the 230 volt mains electricity supply.Figure 2?(i)????? Calculate the potential difference across each lamp when the lamps are connected in series.The lamps are identical.______________________________________________________________Potential difference when in series = ___________ V(1)(ii)???? What is the potential difference across each lamp when the lamps are connected in parallel? Tick (?) one box.?115 V230 V460 V(1)(iii)???? Give one advantage of connecting the lamps in parallel instead of in series.____________________________________________________________________________________________________________________________(1)Q4. (b)?????Figure 1 shows three circuits.The resistors in the circuits are identical.Each of the cells has a potential difference of 1.5 volts.Figure 1?Circuit 1?Circuit 2?Circuit 3(i)??????Use the correct answer from the box to complete the sentence.?half????????????????twice????????????????the same asThe resistance of circuit 1 is _________________ the resistance of circuit 3.(1)(ii)?????Calculate the reading on voltmeter V2.______________________________________________________________Voltmeter reading V2 = _______________ V(1)(iii)????Which voltmeter, V1, V2 or V3, will give the lowest reading?Draw a ring around the correct answer.?V1????????????????????????V2????????????????????????V3(1)(c)?????A student wanted to find out how the number of resistors affects the current in a series circuit. Figure 2 shows the circuit used by the student.Figure 2?The student started with one resistor and then added more identical resistors to the circuit.Each time a resistor was added, the student closed the switch and took the ammeter reading.The student used a total of 4 resistors.Figure 3 shows three of the results obtained by the student.Figure 3????????????????Number of resistors in series(i)??????To get valid results, the student kept one variable the same throughout the experiment.Which variable did the student keep the same?______________________________________________________________(1)(ii)?????The bar chart in Figure 3 is not complete. The result using 4 resistors is not plete the bar chart to show the current in the circuit when 4 resistors were used.(2)(iii)????What conclusion should the student make from the bar chart?____________________________________________________________________________________________________________________________(1)Mark schemesQ1. (e)???? a series circuit has only one path/loop/branch1a parallel circuit has a branch(es) to provide more than one path / loopallow answers that describe the difference in terms of potential difference, current or resistance1(f)????? R1(g)???? P1(h)???? Q = 0.97 × 601Q = 58.2 (C)1Q = 58 (C)an answer of 58 (C) scores 3 marks1[11]Q2. (c)???? 0.13 (A)1(d)???? 0.56 × 3001168 (C)an answer of 168 (C) scores 2 marks1(e)???? 168 × 4.51756 (J)an answer of 756 (J) scores 2 marksallow ecf from part (d)1(f)????? decreases to zeroallow reads zero1(g)???? (A1) decreases to zeroallow reads zero1(A2) decreases1Q3. (c)???? (i)????? 1151(ii)???? 2301(iii)???? if one goes out the other still worksorbrighteraccept power (output) is greatercan be switched on/off independently is insufficient1Q4. (b)???? (i)??????half1(ii)?????3(V)1(iii)????V11(c)???? (i)??????potential difference / voltage of the power supplyaccept the power supplyaccept the voltage / voltsaccept number of cells / batteriesaccept (same) cells / batteriesdo not accept same ammeter / switch / wires1(ii)?????bar drawn – height 1.(00)Aignore width of barallow 1 mark for bar shorter than 3rd bar2(iii)????as the number of resistors increases the current decreases1[10]Revision Homework 8: PhysicsSection 1: KnowledgeTopic:Radioactive decay and radiation (P.22)1What two words can we use to describe the process of radioactive decay?Random and unpredictable2What is the word to describe the rate at which a source of unstable nuclei decaysActivity3What is the word to describe the number of decays recorded each second by a detectorCount rate4What is the equipment for measuring radiation. Geiger-Muller tube5Name three types of nuclear radiationalpha particle, beta particle, gamma ray6Describe the structure of an alpha particle2 neutrons & 2 protons (helium nucleus)7What is a beta particle?A negative electron8What is a gamma ray?A high energy electromagnetic wave9Three main types of radiation in order of high to low ionising power. alpha, beta, gamma10Three main types of radiation in order of high to low penetrating power. gamma, beta, alpha11Distances alpha, beta and gamma can go in air.Alpha: 3-5cm, Beta: ~1m, Gamma: several hundred km Section 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeRecall the definition and units for activity and count rateDescribe what makes up alpha, beta, gamma and neutron radiationDescribe the properties of each type of radiationSection 3: Exam questions Q1. Gamma radiation is emitted from the nuclei of some atoms.(a)??What is a gamma ray? Tick one box.?A helium nucleusA high speed electronA neutronA type of electromagnetic radiation(1)(b)??Which would be the best absorber of gamma radiation? Tick one box.?A few mm of airA thick sheet of cardboardA thick sheet of leadA thin sheet of paper(1)Q2. Alpha, beta and gamma are types of nuclear radiation. A teacher sets up a demonstration of the penetration properties of alpha, beta and gamma radiation. The figure below shows the demonstration.?(a)?????Complete the figure above by writing the name of the radiation in each box.(2)(b)?????Give two safety precautions the teacher should take in the demonstration.1. ____________________________________________________________________________________________________________________________________2. ____________________________________________________________________________________________________________________________________(2)Q3. (a)?????The figure below shows a helium atom.?(i)??????Which one of the particles in the atom is not charged? Draw a ring around the correct answer.electron????????????????neutron????????????????proton(1)(ii)?????Which two types of particle in the atom have the same mass?__________________________ and __________________________(1)(iii)????What is the atomic number of a helium atom? Draw a ring around the correct answer.2????????????????4????????????????6Give a reason for your answer.____________________________________________________________________________________________________________________________(2)(b)?????Alpha particles are one type of nuclear radiation.(i)??????Name one other type of nuclear radiation.______________________________________________________________(1)(ii)?????Use the correct answer from the box to complete the sentence.?electrons????????????????neutrons????????????????protonsThe difference between an alpha particle and a helium atom is that the alphaparticle does not have any _________________________ .(1)(iii)????Which one of the following is a property of alpha particles?Tick (?) one box.Have a long range in airAre highly ionisingWill pass through metals(1)Mark schemesQ1.(a)??a type of electromagnetic radiation1(b)??a thick sheet of lead1Q2.(a) ????gammaallow 1 mark for 1 or 2 correctbetaalpha2(b) ????any two from:?????????do not point (radioactive) source at students?????????keep (radioactive) source outside the box for minimum time necessary?????????wear safety glasses or eye protection or do not look at source?????????wear gloves?????????hold (radioactive) source away from body?????????hold (radioactive) source with tongs / forceps2Q3.(a)???? (i)??????neutron1(ii)?????neutronprotonboth required, either order1(iii)????21number of protonsdo not accept number of electrons1(b)???? (i)??????any one from:?????????beta?????????gammaaccept correct symbolsaccept positron / neutrino / neutroncosmic rays is insufficient1(ii)?????electrons1(iii)????are highly ionising1Revision Homework 9: PhysicsSection 1: Knowledge1Define "irradiation"Exposing an object to nuclear radiation. The irradiated object does not become radioactive.2Define "half life"The time it takes for the number of unstable nuclei of the isotope in a sample to halve3Define "radioactive contamination"The unwanted presence of radioactive atoms on other materials4State two natural sources of background radiationRocks and cosmic rays5State two man made sources of background radiationFallout from nuclear weapons testing, nuclear accidents6Define 'background radiation'Radiation around us all the time. 7Define 'radiation dose'The amount of radiation that is absorbed by a person (Sv)8State 2 medical uses of nuclear radiationExploring internal organs, control/destruction of unwanted tissue.9Would you use a short or long half life material for using a tracer in the intestine?Short – (half a day approximately) - you don't want to leave the hospital if you are still give out high levels of radiation. 10Why can't alpha be used to look at internal organs?It would not be able to penetrate the skinSection 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeDefine half-lifeComplete half-life calculations from graphs or other dataDescribe the impact and precautions for radioactive contaminationSection 3: Exam questions Q1. The nuclei of some isotopes are radioactive. (c)?????The activity of a sample of potassium-40 is measured 3 times.The measurements are given below.?4906 Bq4956 Bq4889 BqWhich of the following statements explains why the readings are different?Tick one box.?Radioactive decay is constant.Radioactive decay is hazardous.Radioactive decay is random.(1)(d)?????The figure below shows how the activity of a sample of potassium-40 changes over time.?Use the figure above to determine the half-life of potassium-40.______________________________________________________________________________________________________________________________________Half-life = ____________________ billion years(2)(e)?????When food is eaten, some of the radiation the food emits is detectable outside the body.Which type of radiation would not be detectable outside the body?Tick one box.?alphabetagamma(1)Q2. Some rocks inside the Earth contain a radioactive element, uranium-238. When an atom of uranium-238 decays, it gives out an alpha particle.(a) ????The following statement about alpha particles was written by a student.The statement is not correct.?Change one word in the statement to make it correct. Write down your new statement.______________________________________________________________________________________________________________________________________(1)(b) ????The graph shows how the count rate from a sample of uranium-238 changes with time.?The graph can be used to find the half-life of uranium-238. The half-life is 4 500 million years.(i)????? Draw on the graph to show how it can be used to find the half-life of uranium -238.(1)(ii)?????There is now half as much uranium-238 in the rocks as there was when the Earth was formed.How old is the Earth?Draw a ring around your answer.?2250 million years4500 million years9000 million years(1)(iii)????If a sample of uranium-238 were available, it would not be possible to measure the half-life in a school experiment.Explain why.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________(2)(Total 5 marks)Mark schemesQ1. (c) ????Radioactive decay is random.1(d) ????1.3 (billion years)allow 1.2-1.4 (billion years)2allow 1 mark for horizontal line drawn from ~ 550(e) ????alpha1[7]Q2.(a)???? alpha particles cannot pass through…do not accept gamma particles…oralpha particles can pass through a very thin sheet of paper / cardcredit answers where correct amendments are made to boxed statement1(b)?????(i)????? horizontal and vertical line drawn at correct positions on the graphaccept a cross drawn at 4500 / 500 on the curveortwo pairs of lines drawn, for example, at 600 and 300accept a horizontal line drawn at 500 on its owndo not accept vertical lines only1(ii)?????4500 million years1(iii)????half-life too longdo not accept simply its half-life is 4500 million years1no (measurable) change in count ratedo not accept have not got the equipmentdo not accept it’s harmful (to children)if neither of the above points scored, accept not enough time to measure it for 1 mark1[5]Revision Homework 10: BiologySection 1: KnowledgeTopicParts of the cell1What is the main difference between a prokaryotic and eukaryotic cell?Eukaryotic have their DNA contained within a nucleus2Give an example of a eukaryotic cell.Animal and plant cells3Give an example of a prokaryotic cell.Bacteria4What is the function of cell wall?Supports/ Strengthens the cell5What is the function of mitochondria?Where respiration takes place6What is the function of the nucleus?Controls the activities of the cell7What us the function of cell membrane?Controls what enters/exits the cell8What is the function of the vacuole?Store sugars and salts9What is the function of chloroplasts?Absorb light for photosynthesis10What is the function of cytoplasm?Where chemical reactions of the cell takes place Section 2: Mastery matrix statements to be answered and then self-assessed using revision guide and knowledgeDescribe the structure of plant, animal and bacteria cells, classifying as prokaryotic and eukaryotic cells.Identify and explain the functions of sub-cellular structuresSection 3: Exam questionsQ1. Figure 1 shows an animal cell and a bacterial cell.Figure 1(a)???? Compare the structure of the cells in Figure plete the sentences.Choose the answers from the box.?cell membranecell wallchloroplastcytoplasmnucleusOnly the animal cell contains a _________________________________________ .Only the bacterial cell contains a _______________________________________ .(2)Q2. Figure 1 shows one type of white blood cell.Figure 1?(a)??What is structure A? Tick one box.?Cell membraneCell wallCytoplasmNucleus(1)Q3.Living organisms are made of cells.(a)?????Animal and plant cells have several parts. Each part has a different function.Draw one line from each cell part to the correct function of that part.?(3)(b)?????The diagram below shows a cell from a plant leaf.?Which two parts in the diagram above are not found in an animal cell?1. _________________________________________________________________2. _________________________________________________________________(2)Q4. (a)???? The diagram shows the structure of a bacterial cell.?(i)??????On the diagram use words from the box to label structures A, B and C.?cell membranecell wallchloroplastcytoplasmplasmid(3)(ii)?????Give one difference between the structure of the bacterial cell and an animal cell.______________________________________________________________(1)(iii)????Name one structure that is found in a plant cell but is not found in a bacterial or an animal cell.______________________________________________________________(1)Q5. The diagrams show an animal cell and a bacterial cell.?(a)???? (i)??????Structures A and B are found in both the animal cell and the bacterial cell.Use words from the box to name structures A and B.?cell membranechloroplastcytoplasmvacuoleA ______________________________B ______________________________(2)(ii)?????Both cells contain genetic material.Name the structure in the animal cell that contains genetic material.______________________________________________________________(1)(b) ????List A gives three structures found in animal cells.List B gives four functions of cell structures.Draw one line from each structure in List A to its correct function in List B.?List A – Structure?List B – Function??Controls what substancesenter the cellCell membrane????PhotosynthesisMitochondrion????Protein synthesisRibosome????Respiration(3)Mark schemesQ1. (a)???? nucleus (1) cell wall (1)Q2.(a)??cell membrane1Q3.(a)????3(b)?????Cell wall1Chloroplastallow (permanent) vacuole1Q4. (a)???? (i)??????A ? (cell) wall1B ? cytoplasm1C ? plasmid1(ii)?????bacterium cell has cell wall / no nucleus / no mitochondria / plasmids presentaccept its DNA / genetic material is not enclosed / it has no nuclear membraneit = bacterium cellaccept converse for animal cellignore flagella1(iii)????any one from:?????????chloroplastignore chlorophyll?????????(permanent) vacuole1Q5.(a)???? (i)??????A = cytoplasm1B = (cell) membrane1(ii)?????nucleus1?(b)?3[6] ................
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