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NJASK Review – Answer Key Ch. 12 Challenge Matching: 1. Newton 2. lubricants 3. vacuum 4. pressure 5. barometer 6. force 7. Bernoulli’s Principle 8. friction 9. terminal velocity 10. gravity Fill-In: 11. friction 12. Bernoulli’s Principle 13. Terminal velocity 14. gravity 15. gravity 16. friction Ch. 13 Challenge Matching: 1. velocity 2. acceleration 3. momentum 4. Newton 5. motion 6. inertia 7. speed Fill-In: 8. speed 9. inertia 10. action force 11. inertia 12. motion Ch. 14 Challenge Matching: 1. Potential energy 2. energy 3. work 4. kinetic energy 5. joule 6. watt 7. power Fill-In: 8. kinetic energy 9. potential energy 10. kinetic energy 11. thermal pollution 12. Law of Cons. of Energy 13. work 14. joule 15. power 16. watts Ch. 15 Challenge Matching: 1. effort force 2. pulley 3. inclined plane 4. work output 5. resistance force 6. work input 7. fulcrum Applying Definitions: 8. A lever is a bar that is free to turn around a fixed point. A fulcrum is fixed point around which a lever turns. 9. A simple machine is something that makes work easier. Simple machines include: inclined plane, lever, pulley, wheel and axle, wedge. A compound machine is composed of two or more simple machines. 10. Mechanical advantage is the number of times a machine multiplies the effort force. Efficiency is the ratio of work input to work output. 11. Work input is the work done ON a machine. Work output is the work done BY a machine. 12. Effort force is the force you apply to a machine. Resistance force is the force that opposes the effort force. Ch. 17 Challenge Matching: 1. medium 2. crest 3. amplitude 4. hertz 5. incident wave 6. normal 7. waves Fill-in: 8. transverse wave 9. longitudinal wave 10. compression 11. wavelength 12. reflection Ch. 18 Challenge Matching: 1. Pitch 2. speed of light 3. vibration 4. overtone 5. timbre 6. ear 7. music 8. hearing 9. sound 10. decibels Fill-In: 11. medium 12. echo 13. intensity 14. ultrasonic 15. fundamental tone