Download 1. The electric pencil sharpener in Mrs. Brown`s classroom gets very

1. The electric pencil sharpener in Mrs. Brown's classroom gets very warm on days when many students need to sharpen their pencils. Choose the form of energy to fill in the blank in the energy conversion diagram below. Electrical Energy ____________________ Heat Energy A. Mechanical Energy B. Chemical Energy C. Light Energy D. Nuclear Energy 2. Study the diagram of the rollercoaster above. Position A is the starting point for the rollercoaster. At which position will the first rollercoaster car have the most kinetic energy? A. Position D B. Position A C. Position C D. Position B 3. Stored _____energy in a flashlight’s batteries becomes light energy when the flashlight is turned on. A. chemical B. mechanical C. sound D. heat 4. Clyde and Marilyn are riding a roller coaster. During which section(s) of the track is their potential energy converted to kinetic energy? A. B. C. D. from point A to point B and from point C to point D
from point B to point D only from point B to point C only from point A to point B only 5. Cynthia is holding a sheet of paper that has a mass of 2 grams. She tears the sheet of paper into many small pieces. Which of the following is true? A. The sum of the mass of all the pieces of paper is more than 2 grams.
B. Each piece of paper has a mass of 2 grams.
C. The sum of the mass of all the pieces of paper is less than 2 grams.
D. The sum of the mass of all the pieces of paper is 2 grams.
6. The law of _______ of energy states that energy cannot be created or destroyed. A. transformation B. absorption C. conservation D. stability 7. What is the correct energy conversion sequence of a gasoline engine? A. chemical energy heat energy mechanical energy
B. chemical energy light energy mechanical energy
C. mechanical energy heat energy chemical energy
D. heat energy mechanical energy light energy
8. _______ energy is defined as the energy of motion. A. Dynamic B. Potential C. Kinetic D. Chemical 9. _______ energy is defined as stored energy.
A. Potential B. Dynamic C. Contained D. Kinetic 10. Skateboarders use a structure called a half‐pipe, like the one shown to the right, to do some impressive moves. Neglecting friction, at which point will the skateboarder's potential energy be greatest? A. X B. W C. Z D. Y 11. There is a skier at the top of a ski slope. The skier has potential energy. What gives the skier his potential energy? A. his speed B. gravity C. friction D. his efficiency 12. The amount of kinetic energy an object has depends upon which of the following factors? I. the object's velocity
II. the object's shape III. the object's density IV. the object's mass A. I, II, III, and IV B. I and III only C. I and IV only D. II and IV only 13. A light bulb is turned on. It produces light and warms up. Which statement is true? A. All the electrical energy is transformed to light energy and heat energy. B. Some of the electrical energy is transformed to light energy and some is destroyed. C. All the electrical energy is transformed to heat energy.
D. All the electrical energy is transformed to light energy.
14. Which of the following is the correct definition of electrical energy? A. energy stored in chemical bonds of molecules
B. energy of an object due to the random motion of its atoms and molecules C. energy resulting from the flow of charged particles, such as electrons or ions D. energy that is transmitted in the form of electromagnetic waves
15. Kinetic energy is the energy of motion. How could you determine how much kinetic energy an object has? A. by finding its height and width B. by finding its mass and speed C. by finding its speed and direction
D. by finding its position and form
16. Spinning wind turbine blades have kinetic energy. Wind turbines transform this energy into electric energy and heat energy in a closed system. Which of the following statements about this energy transformation is true? A. B. C. D. All of the kinetic energy is transformed into electric energy and heat energy. All of the heat energy is transformed into electric energy.
Half of the heat energy is transformed into electric energy.
Half of the kinetic energy is transformed into electric energy and heat energy. 17. Which of the following is the correct definition of thermal energy?
A. energy resulting from the flow of charged particles, such as electrons or ions B. energy of an object due to the random motion of its atoms and molecules C. energy that is transmitted in the form of electromagnetic waves
D. energy an object has because of its motion or position
18. In a closed system, the total energy prior to an energy transformation is _______ the total energy after. A. unrelated to B. less than C. equal to D. greater than 19. A stone held above the ground has potential energy. When the stone is dropped, potential energy is converted to _________ energy. A. electrical B. kinetic C. chemical D. thermal 20. The device shown in the picture is used by electric utility power stations to produce electrical energy from _____ energy. A. mechanical B. solar C. sound D. light 21. A flashlight produces light using energy from the batteries. In which order does the energy change form? A. B. C. D. from electric to light to chemical energy
from electric to chemical to light energy
from light to electric to chemical energy
from chemical to electric to light energy
22. Into what kinds of energy does a toaster convert electrical energy?
A. mechanical and light B. solar and chemical C. D. light and heat heat and chemical 23. Study the diagram of the roller coaster. Position A is the starting point for the roller coaster. At which position will the first roller coaster car have the most potential energy? A. position A B. position D C. position B D. position C 24. A microwave works by focusing microwave light on the food inside of it. Which type of energy transformation takes place in a microwave? A. B. C. D. Light energy is transformed into electrical energy.
Electrical energy is transformed into light energy.
Heat energy is transformed into light energy.
Heat energy is transformed into electrical energy.
25. When talking on a phone, the voice is transformed into electrical energy. This energy passes over wires or is transmitted through the air. Into what kind of energy does the speaker in the phone on the other end change the electrical energy? A. sound B. light C. mechanical D. heat 26. Which of the following is the correct definition of mechanical energy?
A. energy stored in chemical bonds of molecules
B. energy of an object due to the random motion of its atoms and molecules C. energy produced from the splitting of atoms
D. energy an object has because of its motion or position
27. Jeremy had a set of 500 toy blocks that could be connected by snapping them together. At first, he used all the blocks to build a small house. Later, he rearranged all the blocks to build a small car. How did the mass of the house compare to the car? A. The car had a greater mass than the house.
B. C. The house had a greater mass than the car.
The masses were the same. D. There is no way to tell from the information given.
28. Which statement is true about energy changes?
Energy can be created but not destroyed.
A. Energy can be created and destroyed.
B. C. D. Energy cannot be created or destroyed.
Energy can be destroyed but not created.
29. Which of the following household appliances is designed to directly convert electrical energy to heat energy? A. a garbage disposal B. a can opener C. a stove D. a fan