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- 1. Multiple ChoiceTo make an electromagnet, a conductor should be coiled around —a glass tubean iron naila roll of papera wooden stick
- 2. Multiple ChoiceEarly scientists most likely saw a discharge of electricity for the first time when observing a —waterfallrainbowlightning stormvolcano erupting
- 3. Multiple Choice
Which energy transformation most likely occurs in a steam iron?Electrical energy changes to heat energy.Electrical energy changes to sound energyMechanical energy changes to heat energy.Mechanical energy changes to light energy - 4. Multiple ChoiceIn this picture, the iron filings show the shape of the magnetic —axiscorefieldpole
- 5. Multiple ChoiceA fifth-grade class constructed this circuit. Which of these objects most likely made the light glow when connected to points X and Y?Plastic strawCotton stringAluminum foilRubber eraser
- 6. Multiple ChoiceWhich item is designed to change electrical energy into heat energy?alarm clockhand dryerfantelephone
- 7. Multiple ChoiceBits of paper are attracted to the surface of this balloon. What attracts the paper pieces to the balloon?FrictionMagnetismPotential energyStatic electricity
- 8. Multiple ChoiceWhich of these correctly shows what happens when two magnets are placed side by side?FGHJ
- 9. Multiple ChoiceThe electrician in this picture is wearing rubber gloves for protection. The purpose of the rubber gloves is to —keep the electrician drycreate an electrical circuitproduce electricityinsulate the electrician
- 10. Multiple ChoiceAn electric motor is designed to turn electrical energy into —solar energypotential energystatic electricitymechanical energy
- 11. Multiple ChoiceThe energy used to move most bicycles is an example of what type of energy?ElectricalMechanicalChemicalNuclear
- 12. Multiple ChoiceWhich of these can most easily produce magnetic fields?SunlightWindElectricityFlowing water
- 13. Multiple ChoiceBenjamin Franklin conducted this famous experiment that showed lightning was —a movement of air moleculesa magnetic fieldan electrical dischargea glowing chemical
- 14. Multiple ChoiceMany electrical wires are wrapped with a plastic coating because plastic is —less expensive than steelmore dense than copperable to keep its shapea good insulator
- 15. Multiple ChoiceElectric lights will not come on unless their electrical circuit is a —parallel circuitseries circuitclosed circuitshort circuit
- 16. Multiple ChoiceA class prepared some electric circuits using battery, connecting wires, and three light bulbs. Which of these circuits can make the three bulbs light?ABCD
- 17. Multiple ChoiceA bar magnet is placed on a table, and a sheet of blank paper is placed over the magnet. What could be sprinkled on the paper to show the magnetic field of the bar magnet?SaltIron filings. SandSoil
- 18. Multiple ChoiceThe picture shows a comb that was used on a cold, dry day. Which of these cause the bits of paper to be attracted to the comb?Magnetic forcesChemical reactionsStatic electricityHeat differences
- 19. Multiple ChoiceWhich form of energy is best shown in this picture?MechanicalElectricalChemicalNuclear
- 20. Multiple ChoiceBenjamin Franklin discovered the form of energy produced by lightning. Experiments with lightning killed many people before he discovered that lightning is a form of —gravitywatermagnetismelectricity
- 21. Multiple ChoiceWhich of these materials is a good conductor of electricity?RubberGlassMetalNewspaper
- 22. Multiple ChoiceWhat material would be safest to use as an insulator to cover electrical wires?AluminumRubberTinWater
- 23. Multiple ChoiceCopper wire is often wrapped in plastic. Plastic material is a good —electromagnetinsulatorcircuitcurrent
- 24. Multiple ChoiceThe magnetic fields of any magnet are greatest —around the middlearound the polesaround only the south polearound only the north pole
- 25. Multiple ChoiceWhen in operation, this tool transforms electrical energy mostly into —chemical energysolar energysound energymechanical energy
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