2. Chapter 14 Energy!!!

3. Which object has kinetic energy? A rolling ball A rock on the ground A concrete floor A stretched rubber band

4. What is potential energy? Give an example. Potential energy is stored energy that is due to the position or condition of an object (energy at rest)

5. What is kinetic energy? Give an example. Kinetic energy is the energy of motion.

6. What are some forms of energy? Light, thermal, electrical, sound, and chemical

7. Name the parts of a wave. Wavelength Crest Trough Amplitude

8. How is wavelength measured? From crest to crest

9. Which statement about sound waves is true? A.The higher the frequency, the lower the pitch. B.The higher the frequency, the higher the pitch. C.The higher the amplitude, the lower the pitch. D.The higher the amplitude, the higher the pitch.

10. What are two properties that can be used to describe sound? Pitch Loudness

11. Describe the pitch of a sound and give an example. The pitch refers to how high or low the sound is. Example: plucking a guitar string The higher the frequency of a wave, the higher the pitch.

12. So…what is frequency? The number of vibrations (waves) in one second. When a guitar’s string is plucked it produces sound waves or vibrations. Those are measured using frequency. The higher the frequency, the higher the pitch. The lower the frequency, the lower the pitch.

13. Describe loudness. What is it measured in? How loud or soft a sound is. It is measured in units called decibels (db). The higher the amplitude, the louder the sound. The lower the amplitude, the softer the sound.

14. So…what is amplitude? The distance from the top of the crest to resting point. Which wave has the greatest amplitude?

15. What are some examples of waves in the electromagnetic spectrum? X-rays Microwaves UV rays (ultraviolet) Gamma rays Infrared waves Radio waves

16. Name some things Earth gets from the sun’s light energy. Weather Wind The water cycle Energy for plants Energy indirectly for animals (food)

17. Why is asphalt (blacktop) so hot on a hot, sunny day? A.It reflects all wavelengths of light. B.It absorbs all wavelengths of light. C.It diffracts all wavelengths of light. D.It refracts all wavelengths of light.

18. What does the color of an object depend on? It depends on which wavelengths of light the object reflects!! Example: You see a red apple because the red wavelength is reflected while all other colored wavelengths are absorbed.

19. How about white and black?? Why do you see black? Because all colored wavelengths are absorbed, nothing is reflected. Why do you see white? Because all colored wavelengths are being reflected by light.