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Name ______________________________ Class ___________________ Date __________________ Skills Worksheet Directed Reading B CH. 9 Sec. 1 Section: What Is Energy? ENERGY AND WORK: WORKING TOGETHER Circle the letter of the best answer for each question. 1. What is the ability to do work called? a. movement b. energy c. power d. force KINETIC ENERGY 2. What is the energy of motion called? a. potential energy b. mechanical energy c. kinetic energy d. force energy Kinetic Energy Depends on Mass and Speed 3. In the formula for kinetic energy, what does the m stand for? a. measurement b. mechanical energy c. mass d. meter 4. When a moving object has a greater mass, what happens to its kinetic energy? a. Its kinetic energy becomes greater. b. Its kinetic energy becomes less. c. Its kinetic energy stays the same. d. Its kinetic energy stays the same and then becomes less. Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 12 Energy and Energy Resources Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Circle the letter of the best answer for each question. 5. Speed has the greatest effect on which of the following types of energy? a. kinetic energy b. mechanical energy c. potential energy d. force energy POTENTIAL ENERGY 6. The energy an object has because of its position is called what? a. mechanical energy b. potential energy c. kinetic energy d. thermal energy Gravitational Potential Energy 7. When you use force to lift an object, what are you giving the object? a. mechanical energy b. wind energy c. gravitational potential energy d. thermal energy Calculating Gravitational Potential Energy 8. The amount of gravitational potential energy that an object has depends on what? a. the object’s height and circumference b. the object’s weight and height c. the object’s weight and energy d. the object’s height and energy Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 13 Energy and Energy Resources Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Circle the letter of the best answer for each question. 9. Which of the following is the formula for gravitational potential energy? a. gravitational potential energy = kinetic energy potential energy b. gravitational potential energy = kinetic energy potential energy c. gravitational potential energy = weight height d. gravitational potential energy = weight height Height Above What? 10. If an egg is sitting on a kitchen counter, what would you measure to determine its gravitational potential energy? a. the egg’s height from the ceiling b. the egg’s kinetic energy c. the egg’s length d. the egg’s height from the floor MECHANICAL ENERGY 11. What is the total energy of motion and position of an object called? a. potential energy b. gravitational potential energy c. mechanical energy d. kinetic energy 12. Which of the following is the formula for finding mechanical energy? a. mechanical energy = potential energy + kinetic energy b. mechanical energy = potential energy kinetic energy c. mechanical energy = potential energy + gravitational potential energy d. mechanical energy = potential energy gravitational potential energy Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 14 Energy and Energy Resources Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Mechanical Energy in a Juggler’s Pin Circle the letter of the best answer for the question. 13. When the juggler moves the pin, what kind of energy is moved to the pin? a. potential energy b. kinetic energy c. mechanical energy d. gravitational potential energy OTHER FORMS OF ENERGY Thermal Energy 14. How do particles move at higher temperatures compared with how they move at lower temperatures? a. They move slower at higher temperatures. b. They move faster at higher temperatures. c. They move at the same speed at all temperatures. d. They move in circles at higher temperatures. Chemical Energy Read the description. Then, draw a line from the dot next to each description to the matching word. 15. all of the kinetic energy due to random motion of the particles that make up an object 16. energy of a compound that changes as its atoms are rearranged 17. energy of moving electrons • • • a. chemical energy b. thermal energy c. electrical energy Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 15 Energy and Energy Resources Name ______________________________ Class ___________________ Date __________________ Directed Reading B continued Sound Energy Read the description. Then, draw a line from the dot next to each description to the matching word. 18. energy that comes from changes in the nucleus of an atom 19. energy produced by the vibrations of electrically charged particles 20. energy caused by an object’s vibrations • • • a. light energy b. nuclear energy c. sound energy Read the words. Read the sentences. Fill in each blank with the word or phrase that best completes the sentence. fission fusion 21. A nuclear reaction called ______________________ produces the sun’s light and heat. 22. The electrical energy at nuclear power plants is made by ______________________ . Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science and Technology 16 Energy and Energy Resources