PLANT ADAPTATIONS



ELECTRICITY & MAGNETISM 4 weeks

Physical World Achievement Objectives:

Physical inquiry and physics concepts

• Identify and describe the patterns associated with physical phenomena found in simple everyday situations involving movement, forces, electricity and magnetism, light, sound, waves, and heat. For example, identify and describe energy changes and conservation of energy, simple electrical circuits, and the effect of contact and non-contact on the motion of objects.

Using physics

• Explore a technological or biological application of physics.

Focusing questions?

• How do we get static electricity shocks?

• How does a photocopier work?

• What substances conduct best?

• How is electricity made?

• How is magnetism related to electricity?

• What is a circuit diagram?

• How do fuses work?

Key competencies focus:

All key competencies are incorporated into this unit of work, however, in this unit there is particular emphasis on:

• Using language, symbols, and texts.

• Participating & contributing.

Assessment Focus:

• Written test

Literacy Focus:

Key words/Terms

Key words/terms: nucleus, proton, neutron, electron, charge, positive, negative, static, conductor, insulator, current, amp, volt, resistance, resistor, circuit, lamp, switch, cell, battery, ammeter, voltmeter, series, parallel, fuse, magnetic field, fuse.

Note: NOS = Nature of Science text NMS = New Millennium Science text, KISS = Kiwi Integrated Science text.

|Learning Experiences |Resources |Nature of science |

|Electrostatic charges (Static electricity) |Pretest | |

|Pretest |NOS 2 p 162-163 |Investigating |

|Rub plastic ruler to pick up pieces of paper, bend stream of water |WB Ex21.10 p106-107 ‘The principles of electrostatics’ | |

|Carry out practical involving 2 plastics which charge oppositely. |KISS Bk3, p72 | |

|Revise structure of the atom and the discuss fact that only electrons move. |Static electricity kit. | |

|Explain concept that electrons get rubbed off one material and end up on another.|See Practical Guideline sheet in folder. | |

| | | |

|Van der Graff generator – explain how e’s have been rubbed off & end up on metal | | |

|top and then jump off as a spark. |Van der Graaff generator. | |

|Practical: Write up in workbook |Brainbops animations (Static, Thunderstorms) | |

| |Static: |

| |ity-video.htm | |

| | | |

| | | |

| | | |

| | | |

| | | |

| | | |

| |WB p166-167 | |

|Uses & dangers of static |WB Ex21.11 p107-108 ‘Danger! Static electricity’ |Participating and contributing. |

|Technological uses of static. |Hmwk: “Dangers of static” worksheet. | |

|Literacy exercise: How does a photocopier work? |Laser printer: | |

|Show Howstuffworks clip on how a laser printer works once. | |

|Write focusing questions on the board. Show video again. Write answers to Q’s on |m | |

|the board. | | |

|Students write a paragraph. Help with scaffolding. |Electrostatic spray painting: | |

|How lightning occurs. | | |

| |What are the odds of being struck by lightning? | |

| | | |

| | | |

| | | |

| |Lightning strikes uTube videos: | |

| | |

| |rikes+video | |

|Conductor & Insulators | |Investigating |

|Practical: Finding out what substances conduct.(test plastic, glass rod, wood, |KISS Bk 4 p46 “What Conducts” | |

|pencil lead/graphite, metal item, tap water, salt water) | | |

|Metals conduct, non-metals don’t except C and salt water. |OHT Conductor & Insulator | |

|Current |KISS Bk 4, p50 |Investigating |

|Model of copper wire and electron flow. |Handout to stick in book of copper wire model. |Understanding |

|Current = electron flow. Discuss attraction and repulsion between terminals. |Electrons in wire: |Participating and contributing |

|Discuss Coulomb = 6.25 X 1018 electrons. | |

|Practical: Making electricity, using chemicals (Zn/Cu galvanic cell). Measure |deo.htm | |

|current with galvanometer, multimeter or use LED. |Circuits: | |

|May need to measure voltage as indication of current since current may be too | |

|small to measure. |.htm | |

|Conclusion: Need reactive and non reactive metal plus an electrolyte(acid). |Beaker, electrodes, wires, galvanometer/multimeter, LED’s. | |

| |Set up zinc with zinc (no voltage), copper with copper (no voltage) then copper with zinc | |

| |(1 volt). | |

| |WB Ex 22.01 p155 ‘Moving charges” | |

| |NOS 2 p172-175 | |

| |NMS 2 p78-79 (Electricity) | |

|Making a battery |AA dry cells |Investigating |

|Organising cells in series and parallel and measure current and voltage. |Ammeters and voltmeters (or multimeter). | |

|Making a current using a magnet. |NOS 1 p144-145 |Investigating |

|Practical: Investigating a magnetic force field (magnet & iron pin dust). |NMS 1 p46-47 (Magnetism) |Participating and contributing |

|Draw magnet & field lines. |WB Ex21.12 p108-109 ‘Magnet basics’ | |

|Demonstrate how magnet & coil can be used to generate alternating current. |WB p168-170 for magnetism practicals. | |

|Use hand generator to make bell ring and to give people shocks. |WB Ex22.03 p116 ‘Electric motors” | |

|Use internet to write a report on how any one of the following methods of |KISS Bk 3, p66 – 69 | |

|electricity generation works. |Brainiacs: K:\2009 Science\Downloaded Videos\Brainiacs | |

| |Possible video clip on hydro power (others there too): | |

| | |

| |o.htm | |

| |Wind turbines: | |

| | |

| |m | |

|Making an electromagnet |Coil & iron rod/nails, paper clips |Investigating |

|Practical: Make electromagnet (do as practical or demonstrate) – coil & iron rod.|WB Ex 22.02 p115 “Electromagnets” | |

|Must cover electromagnet so students understand later assessment. |Understanding electromagnetism: | |

| | |

| |htm | |

|Heating with resistance wire. | |Investigating |

|Practical: Nichrome coil & small beaker of water. |Nichrome coil & small beaker of water, power pack, thermometer. | |

|Graph data for various voltages (water temp vs voltage). The higher the voltage |See student instruction sheet (DON’T do as assessment). | |

|the greater the electrical energy, so higher temp.. | | |

|Discuss toasters, heaters, jugs etc | | |

|Demonstrate: Variable resister. | | |

|Hmwk: Electrical symbols (needs to be done for next period). | | |

|Volts & Amps |KISS Bk 4, Chapter 8 p45 - 72 |Investigating |

|Practical: Observe bulb brightness as voltage increased. |Power pack, bulbs, wires, ammeter | |

|Measure current as voltage increased from 2V to 12V. | | |

|Define 1 amp = 1 coulomb per second | | |

|Define voltage as energy supplied/used up by bulb (leave voltage = potential | | |

|difference till Y11) | | |

|Graph volts vs amps. | | |

| Series circuits |NOS 2 164-165 |Investigating |

|Introduce circuit symbols & diagrams. |NMS 2 p70-71 (Circuits) |Communicating |

|Practical: Observe brightness of bulbs as additional bulbs are added up to 3. |WB Ex 22.05 p118 ‘Electrical symbols’ | |

|Record current at various places in circuit. |KISS Bk 4, Chapter 8 p45 - 72 | |

|Record voltage over each lamp. |Power pack, bulbs, wires, ammeter | |

|Discuss increased resistance due to additional light bulbs in circuit causing | | |

|decrease in current. | | |

|Discuss sharing of electrical energy resulting V1 + V2 etc= Vtotal v of powerpack| | |

| Parallel circuits |NOS 2 p166-167 |Investigating |

|Practical: Observe brightness of bulbs as additional bulbs (loops) added up to 3.|NMS 2 p72-73 (Wiring) | |

|Record total current at beginning and end of circuit, and current in each loop. |KISS Bk 4, Chapter 8 p45 - 72 | |

|Explain splitting of flow of electrons (like river taking different channels then|Power pack, bulbs, wires, ammeter | |

|rejoining). | | |

|Establish rule I1 + I2 + I 3 = I tot | | |

|Explain voltage same in each loop so bulbs same brightness. | | |

| | | |

| | | |

| | | |

| Fuses |KISS Bk 4, Chapter 8 p45 – 72 |Investigating |

|Practical: Use small piece of iron wool as fuse. |WB Ex22.13 and 22.14 p125-126 ‘Heating up’ |Participating and contributing |

|Additional bulbs in parallel added and record current. | | |

|Add bulbs until iron wool melts. | | |

|Watch ammeter as current max’s out and stops when fuse blows. | | |

|Explain overloading of power points and safety reasons for fuse wire. | | |

|Using a rheostat (variable resistor) to control current. | | |

| | | |

| | | |

| |NOS 2 p176-177 | |

| |NMS 2 p80-81 (Control) | |

|Three point plugs |NOS 2 p176-177 |Investigating |

|Wire up a three point plug and describe the role of each wire and relate to |Tray of three point plugs. | |

|previous lesson on fuses. |WB Ex22.12 p124 ‘The three pin plug’ | |

| Test revision period.- |NOS 2 p168-171 | |

| |NMS 2 p74-75 (Current) | |

| |NMS 2 p76-77 (Voltage) | |

| TEST | | |

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download