2. Glossary of Terms Wave-something that moves energy through something else Medium- anything that a wave travels through Transverse waves- a wave that moves up and down like a water wave Compressional wave- A wave that moves back and forth like a slinky Crest- the highest point in a transverse wave Trough-the lowest point of a transverse wave. Wavelength- the distance from one crest to another. Frequency- the amount of full waves per second.

3. Glossary Cont. Amplitude- the amount of energy in one wave. Refraction- when he wave bends as it moves from one place to another Diffraction- the bending of a wave around something or the wave going through a narrow space. Interference- when two or more waves hit and either forms a bigger wave or a smaller wave. Resonance- the ability of an object to vibrate by absorbing energy at its natural frequency.

4. What are they? A wave is something that moves energy from one place to another and will only go as far as the energy will carry it.

5. Things that have waves.

6. How to make waves Hold a rope at one end and then shake it a little bit. The wave travels along the rope to the end and then is still after that

7. Mechanical waves The two types of mechanical waves are Transverse and Compressional waves.

8. Transverse waves A transverse wave moves matter in the medium back and forth at right angles to the direction that the wave travels. (draw the picture)

9. Compressional waves Compressional waves are waves that move back and forth like a slinky. (draw the picture)

10. Acoustic/Sound waves Sound waves are Compressional waves. The molecules of air pushed together by the vibrations and then released as they move to the human ear.

11. Water waves Water waves are not purely transverse waves. The water also moves slightly back and forth as it goes up and down.

12. Seismic waves Seismic waves are caused by the sudden breaking of rock within the earth. These types of waves are recorded on a seismograph. (draw the pictures in the blanks) SP

13. Wavelength The wavelength is the distance from one crest to another.

14. Reflection Reflection is when a wave hits something and it bounces in a different direction. Ex: Echo or mirror

15. Refraction Refraction is when the wave bends as it changes speed by going from one medium to another. Ex: straw in a glass

16. Diffraction Diffraction is the bending of a wave around an object or through a narrow space.

17. Interference Interference is when two waves combine to form a new wave of a larger or smaller amplitude and/or wavelength.

18. Constructive interference When two waves combine and form a wave with a larger amplitude.

19. Destructive interference Destructive interference is when two waves combine and form a lesser wave amplitude.

20. Standing Wave A standing wave is a special type of wave pattern that forms when waves equal in length and amp but travel in opposite directions

21. Music Waves A standing wave is seen in music when you strum a guitar. The string of the guitar creates a standing wave.

22. Resonance Resonance is the ability to vibrate an object at its natural frequency.

23. Frequency Frequency is the number of full waves that pass a stationary point in one second.

24. Speed The velocity (speed) of a wave is found by multiplying the wavelength by the frequency. Speed=wavelength X frequency

25. Amplitude The amplitude is the amount of energy in one wave.

26. Bibliography McLaughlin Thompson Zike. Integrated Physics and Chemistry. New York, New York: McGraw-Hill Companies, Inc., 2002. “What Is Seismology and What Are Seismic Waves?”18 April, 2004. UPSeis. <http://www.geo.mtu.edu/UPSeis/wav es.html>

27. Bibliography Cont. “Lesson 4: Standing Waves.” Study Works Online. The Physics Classroom. 17 April, 2002. <http://www.physicsclassroom.com/ Class/waves/U10L4a.html>