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How much does it cost?It costs 76p to use the ovenA day is 24 hours so a week is 168 hours; it costs ?50.40 to use the refrigeratorWashing machine costs 50p; oven costs ?1.14; vacuum cleaner costs 8.7p; music costs 3p; total cost is ?1.757 / ?1.76TV costs 3p; hair dryer costs 7.3p; total cost is 10.3pOne light bulb costs ?3.50 for 7 hours; total cost of 66 light bulbs is ?231One light bulb cost ?1 for 2 hours; total cost of 66 light bulbs is ?66; total saving is ?165Energy and FoodsAny sensible answers, such as examples of foods high in fat and sugar (carbohydrates) as these food groups provide most of our energyButter has 8000 kJ in 250 gFish = 920 kJ; butter = 320 kJ; bread = 962 kJ; tomatoes = 40 kJ; total = 2242 kJ2.5 hoursPregnancyLine graphTime in weeks on x-axis (1 small square = 2 weeks) and length in mm on y-axis (1 small square = 30 mm). The line of best fit needs to be drawn with a ruler and go through the centre of the plots. It doesn’t have to start at the origin but it will hit the x-axis at approximately 7 weeks.The baby grows 130 mm between 16 and 20 weeksThe baby grows 30 mm between 36 and 40 weeks so it grows more between 16 and 20 weeksThe change in length between 20 and 36 weeks is 240 mm; this is 16 weeks which means the baby grows 15 mm each weekDrinks and their acidity4.01.6Cola5.05.47.57.7Trees and leavesIt’s difficult to calculate the exact area of the leaves using a computer but the leaf on the right appears to have to larger areaTree 1 is 5 years oldTree 2 is 12 years oldTree 3 is 30 years oldTree 4 is 15 years oldTree 5 has a circumference of 37 cmTree 6 has a circumference of 222 cmTree 7 has a circumference of 92.5 cmTree 8 has a circumference of 316.35 cmFood ChainsApproximately 6.5 urchinsApproximately 4 kelp6.5/4 = 1.625 urchins32.5 urchins11 otters6.5 urchins can survive on 4 kelp plants so 32.5 urchins can survive on 20 kelp plants45.5 urchins and 28 kelpIf the otters leave then the number of urchins would increase which means the number of kelp would decrease. This will be sufficient to answer this question.However, some pupils might understand that this would mean less food for the urchins so their number would start to decrease again. If this happens then the number of kelp would increase. This would mean the number of urchins would also increase and it starts all over again!PlanetsNeptune110 oC5677 million km216 million km12 yearsPluto is 2953 mm from the Sun; Earth is 75 mm from the SunSolute, Solvent and SolutionMass of solution (coffee) is 72 gMass of solution (sugar) is 69.61 gMass of solvent is 259.25 gLine graphTemperature in 0C on x-axis (5/6 small squares = 10 0C) and solubility in g per 100 g of water on y-axis (1 small square = 15 g per 100 g of water). The line should be slightly curved, drawn free hand and be smooth. The results show that the solubility increases as the temperature increases and that it is increasing at an increasing rate.CO2 Emissions700 kg per year2320 kg per year (need to double twice)55 kg per year (need to halve twice); however, it could be argued that the number of people doesn’t make a difference as it is a bus so the value could be 110 kg for ? a year (6 months)Train = 25 kg; eco-car = 262.5 kg; total = 287.5 kg per year4 x 4 would produce 1200 kg for 4 people travelling 15 miles every year; this is 1800 kg for 6 people travelling 15 miles every year which is a total of 5400 kg in 3 years (36 months); however, all 6 people could fit into the 4x4 so the total could be 1200 x 3 = 3600 kg in 3 years120 kg; however, it could be argued that it will be 480 kg as the car is still being driven the same distance for the same amount of time as for a family of 44 x 100 m Relay9.18.99.01Team 2, leg 3Team 2, leg 1Team 1 = 37.27 s; Team 2 = 36.97 s; Team 3 = 37.75; Team 2 won the raceMelting and Boiling PointsBlueMelting point is –220 oC; boiling point is –180 oC; difference is 40 oCBoiling point of astatine is 330 oC; boiling point of chlorine is –30 oC; difference is 360 oCLiquidBoth bromine and iodine have a range of 80 oCBoiling point of bromine is 70 oC; boiling point of oxygen is therefore –180 oC; correct bar drawnVenn DiagramsIt does depend on what “live” means. For example, does it mean hunting for food? Here is what I think but you may disagree with some of them!On landKangaroo, butterfly, antelope, sparrow, rabbit, crow, tortoise, dog and squirrelLive on land and in waterSnail, beetle, crab, seal, duck, penguin, hermit crab, turtle, frog, otter and platypusIn waterFish, squid, starfish, shark, octopus, ray and sea horse9 animals live on land7 animals live in water16 animals live on land or in water12 animals live on land and in waterAnother way of grouping the animals would be: carnivore (eats meat only), herbivore (eats plants only) and omnivore (eats both).Growth RatesAs time goes on, the length increases but the size of the increase (or the rate of the increase) slows downBigger2 cmFalse according to the results but they are the median values – this means it could be true for a particular baby0 to 3 months = 10 cm; 9 to 12 months = 3 cm; this means the increase in length slows down as the baby gets olderThe length increases by 1 cm a month for the last 4 months which means this might continue for the next 12 months; this means the length after 24 months (2 years) might be 88 cmPetrolLine GraphAmount of petrol in litres on x-axis (3 small squares = 1 litre) and distance travelled in kilometres or km on y-axis (1 small square = 6 kilometres or km). The line of best fit should be drawn with a ruler and go through the centre of the plots.The anomaly is 40 kilometres (for 6 litres of petrol); answer can be obtained using the graph but it will be approximately 71 or 72 kilometresAnswer can be obtained using the graph but it will be approximately 42 kilometresCar can travel 120 kilometres using 10 litres so it can travel 240 kilometres using 20 litresAnswer can be obtained using the graph but it will be approximately 7.6 litresChemical ReactionLine GraphMass of calcium chloride in g on x-axis (1 small square = 1 g) and temperature in oC on y-axis (1 small square = 3 oC). The line of best fit should be drawn with a ruler and go through the centre of the plots.As the mass of calcium chloride increases, the temperature increases; the increase in temperature is also approximately proportional to the increase in mass of calcium chloride as the line of best fit is straightAnswer can be obtained using the graph but it will be approximately 37.5 oCThe value for 30 oC can be plotted on the graph and the line can be extended to find the answer; it will be approximately 64 to 65 oCAccording to the results, there is an approximately 7.5 oC rise in temperature for every 5 g of calcium chloride. This means that a temperature of approximately 94 oC would be reached if 50 g of calcium chloride were used. This temperature is possible because it is under the boiling point of water (100 oC). ................
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