1. The Sun directly provides. A water energy B wind energy C heat energy D electrical energy

Transcription

1 1. The Sun directly provides A water energy B wind energy C heat energy D electrical energy

2 2. What is the Sun doing in this picture? F Burning away the clouds in the sky G Drying up the plant roots H Providing energy so the flowers can grow J MelHng the flower petals

3 3. Which energy source is used to operate a sailboat? A Wind B Sun C Wood D Water

4 4. Which energy source is renewable? F Wind G Coal H Oil J Natural gas

5 5. A hiker included a reflechon cooker and a pot in her backpack. She was planning to cook her food aper hiking on a trail. From which source was she MOST likely trying to capture energy to cook her food? A the wind B coal C water D the Sun

6 6. This instrument uses F fossil fuels G wind energy H light energy J solar energy

7 7. Which picture BEST shows a renewable resource being used to do work? A C B D

8 8. A balloon has a negahve charge. A glass rod has a posihve charge. What will happen when the glass rod is brought near the balloon? A. The balloon will be avracted to the rod. B. The balloon will be repelled by the rod. C. The balloon will remain in place. D. The balloon will spin in circles.

9 9. A balloon is rubbed with a piece of cloth. As a result, the balloon has a negahve charge. What has happened? A. Electrons have moved from the inside to the outside of the balloon. B. PosiHve charges have traveled from the balloon to the cloth. C. Electrons have moved from the balloon to the cloth. D. Electrons have traveled from the cloth to the balloon.

10 10. StaHc electricity happens when electrons pass from one object to another, such as from your hair to a comb as you comb your hair. If you then hold the comb near your hair, strands of hair appear to move forward and shck to the comb. The hair and the comb A. avract each other because they have the same charges. B. avract each other because they have opposite charges. C. repel each other because they have the same charges. D. repel each other because they have opposite charges.

11 11. A teenager removes the plashc wrapping from a CD. The pieces of wrap cling to her hand. Which of the following forces causes the wrap to cling to her hand? A. electrostahc B. gravitahonal C. magnehc D. net

12 12. A balloon has a charge. The balloon is passed over pieces of paper that are lying on top of a table. Immediately, the paper comes o the table and shcks to the balloon. Why does this happen? A. The balloon and paper are both pushed away from the table. B. The balloon and paper both have the same charges. C. The paper is avracted to the balloon. D. The paper is pushed away from the table.

13 13. A copper sphere, a glass sphere, a plashc sphere, and a rubber sphere are placed on individual insulahng stands. A student touches each sphere with an electrically charged object. The sphere made of which material will distribute the electric charge fastest over its enhre surface area? A. Copper B. Glass C. PlasHc D. Rubber

14 14. A neutral balloon is rubbed with a piece of wool cloth. As a result, the balloon has a negahve stahc charge. Which of the following statements best explains why the balloon has a negahve charge? A. The balloon is a conductor. B. The balloon is an insulator. C. The balloon transfers charges to the cloth. D. The balloon receives charges from the cloth.

15 15. Which statement best describes what will happen if Bulb 2 burns out?. Look at the diagram of the circuit below. A. Bulb 1 will also burn out. B. Bulb 1 will flash on and off. C. Bulb 1 will stay lit and become brighter. D. Bulb 1 will stay lit but will become less bright.

16 16. Each picture shows a light bulb connected to a bavery. Which bulb will light? A

17 17. Which best describes a parallel circuit? A. Electricity flows along one pathway. B. The flow of electricity comes from one source. C. Electricity flows along more than one pathway. D. The flow of electricity comes from more than one source.

18 18. The diagram below shows an electrical circuit. This circuit is a series circuit because A. it has two light bulbs. B. the same current flows through both light bulbs. C. it uses a single bavery. D. the current is divided between the light bulbs.!

19 19. Electricity in circuits can produce light, heat, sound, and magnehc effects. Electrical circuits require a complete loop through which the electrical current can pass. Which object would you avach to the wires in this picture to enable the bulb to light up. Explain why you chose this object.!

20 20. In the electric circuit shown, a student wants to replace Wire 1 with a different conductor. Which of the following materials could be used in place of Wire 1 to make the bulb light? A. A plashc ruler B. A wooden pencil C. A steel clothes hanger D. A covon ribbon

21 21. A circuit is shown. What will happen if a wire is disconnected?! A. Electricity will conhnue to flow. B. The bavery will run out of energy. C. The bell will be unable to ring. D. The bulb will stay lit.

22 22. Assuming that the light bulbs and baveries are the same, which of these circuits would allow light bulb A to shine the brightest?

23 23. In which of the drawings below will the bulb light?

24 24. Look at the diagram of the bar magnets below. What will happen to the force between the two magnets if they are pulled farther apart? A. The force would be weaker. B. The force would be stronger. C. The force would stay unchanged. D. The force would reverse the poles.

25 25. Use the illustrahon below to answer the following queshon. Look at the two magnets above. If you push the two magnets toward each other as shown, the magnets will A. break into many pieces. B. turn in opposite direchons. C. be pushed away from each other. D. be pulled toward each other.

26 26. Iron filings and bar magnets were placed on a sheet of paper. The following diagram shows the pavern made on the paper. At which locahon is the magnehc field the strongest? A. 1 B. 2 C. 3 D. 4

27 27. The picture below shows magnet 2 being pushed toward magnet 1. Which of the following will most likely happen to magnet 1 as magnet 2 is moved closer? A. Magnet 1 will move under magnet 2. B. Magnet 1 will move toward magnet 2. C. Magnet 1 will move on top of magnet 2. D. Magnet 1 will move away from magnet 2.

28 28. The diagram below represents two bar magnets. Which of the following diagrams shows the effect of magnehc energy on the magnets as the two magnets above are moved closer together?

29 29. A student places one magnet above another magnet as shown below. Why does the top magnet appear to float above the bovom magnet? A. The magnets are made of different material. B. The opposite poles of the magnets repel each other. C. The like poles of the magnets repel each other. D. The magnets have a different gravitahonal avrachon.

30 30. Which of the following diagrams correctly demonstrates the magnehc fields around a bar magnet?

31 31. Jose has two bar magnets. He pushes the ends of the two magnets together and then he lets go. The magnets move quickly apart. Which of the following statements best explains why this happens? A. The north poles of the two magnets are facing each other. B. One magnet is a north pole and one magnet is a south pole. C. The ends of magnets repel each other but the centers avract. D. One magnet is storing energy and one magnet is releasing energy.

32 32. The diagram below shows that the magnehc field of Earth is similar to that of a bar magnet. At which locahon is Earth's magnehc field the strongest? A. 1 B. 2 C. 3 D. 4

33 33. The diagram below shows pieces of scrap iron being picked up by a metal disk hanging from a crane. The pieces of scrap iron are avracted to the metal disk. The metal disk is most likely funchoning as which of the following? A. A bavery B. An insulator C. An engine D. An electromagnet

34 34. The picture below shows a compass. Which type of energy causes the needle on this compass to move? A. heat B. light C. magnehc D. sound

35 35. Adding a second bavery to an electromagnet will. A. decrease the resistance in the wire B. decrease the magnehsm in the wire C. increase the current owing through the wire D. increase the amount of current needed to magnehze the wire

36 36. Which of the following is shown above? A. electromagnet B. electric motor C. electric generator D. transformer

37 37. Which of the following electromagnets would have the greatest magnehc field?

38 38. Stacie wants to make an electromagnet using a copper wire wrapped around an iron bar, as shown below. To make the bar an electromagnet, what should Stacie do next? A. connect the wire to a bulb B. heat the wire around the bar C. send a current through the wire D. touch the ends of the wire together

39 39. A student coiled wire around a nail, avached both ends to a 1.5- V bavery, and avempted to lip paper clips with the nail. What is a valid conclusion for this inveshgahon? A. Increasing voltage increases electromagnehc strength. B. Increasing the number of turns of wire decreases electromagnehc strength. C. Increasing the number of turns of wire increases electromagnehc strength. D. Increasing the number of turns of wire has no effect on the electromagnehc strength

40 40. Water can provide energy that may be changed into electricity. Which kind of water could be used to provide electricity? A. pure B. moving C. deep D. cold

41 41. Windmills are used to convert wind energy into a more useful form. In most cases, there are three steps in this process. The energy is in a different form at each step. Which of the following flowcharts shows the most likely order of the energy changes? A. wind energy è mechanical energy è solar energy B. wind energy è thermal energy è mechanical energy C. wind energy è solar energy è electrical energy D. wind energy è mechanical energy è electrical energy

42 42. A solar panel is used to collect energy from the Sun and change it into other forms of energy. The picture below shows some solar panels on the roof of a building. Which form of energy is collected by the solar panels? A. wind B. sound C. magnehc D. light

43 43. Heat, light, and sound are all different forms of A. fuel. B. energy. C. maver. D. electricity.