2. Divide Into groups of 3-4. You will need 1 person to write your answer on the white board, and 1 person to keep track of the scores using paper/pencil. ROTATE AFTER EVERY 3 QUESTIONS. The 1 st group will choose the question. The fastest group, with the most correct answer, will get the points. That group will choose the next question.

3. Piece of Cake Section 1 Section 2 Section 3 Risky 100 200 300 400 500 400 300 200 100 500 400 300 200 100 500 400 300 200 100 500 400 300 200 100

4. QUESTION: Define a Wave ANSWER: A repeating disturbance that transfers energy through matter or space.

5. QUESTION: What is a medium? ANSWER: Matter through which a wave can travel

6. QUESTION: When a transverse wave travels through a medium, which way does matter in the medium move? A. In Circles B. All directions C. At right angles to the direction that the wave travels D. Parallel to the direction the wave travels. ANSWER: C. At Right Angles to the direction that the wave travels.

7. QUESTION: Are seismic waves longitudinal waves or transverse waves? ANSWER: Both

8. QUESTION: What 2 waves do not need a medium to travel through? ANSWER: Light and Radio waves.

9. QUESTION: Define crest and trough. ANSWER: Crest- high point of a transverse wave. Trough- low point of a transverse wave.

10. QUESTION: Define compression and rarefaction. ANSWER: Compression- More dense region of a longitude wave. Rarefaction- The less dense region of a longitudinal wave.

11. QUESTION: What is the relationship between wavelength and frequency? ANSWER: As frequency increases, wavelength decreases.

12. QUESTION: A wave traveling in water has a frequency of 250Hz and a wavelength of 6.0 m. What is the speed of the wave? ANSWER: 1500 m/s

13. QUESTION: A sound wave with a frequency of 100.0 Hz travels in water with a speed of 1500 m/s, and then travels in air with a speed of 340 m/s. Approximately how much larger is the wavelength in water than in air? ANSWER: Water: 15 m Air: 3.4 m 15-3.4= 11.6 m

14. QUESTION: Define refraction. ANSWER: The bending of a wave caused by a change in its speed as it travels from one medium to another.

15. QUESTION: Define Diffraction ANSWER: The bending of a wave around an object.

16. QUESTION: What happens during interference? ANSWER: Two or more waves overlap and combine to form a new wave.

17. QUESTION: What are nodes? ANSWER: Locations where the interfering waves always cancel

18. QUESTION: Name 2 differences between AM and FM Radio Waves. ANSWER: AM radio waves have longer wavelengths than FM waves. AM waves are able to diffract around obstacles, while FM waves cannot.

19. QUESTION: Which type of wave has points, called nodes, that do not move? ANSWER: Standing Wave

20. QUESTION: What is measured in Hz? ANSWER: Frequency

21. QUESTION: What is the formula for calculating wave speed? ANSWER:

22. QUESTION: What does the Law of Reflection state? (HINT: TENNIS BALL) ANSWER: The angle of incidence is always equal to the angle of reflection.

23. QUESTION: The process by which an object is made to vibrate by absorbing energy at its natural frequencies is …? (HINT: GUITAR STRINGS) ANSWER: Resonance

24. QUESTION: What is the number of waves that passes a point in a certain time called? ANSWER: Frequency

25. QUESTION: The ___________of a wave is the amount of time it takes one wavelength to pass a point ANSWER: Period

26. QUESTION: True or False: Sound waves cannot travel through liquids and solids. ANSWER: FALSE

27. QUESTION: What “illusion” does refraction of light in water cause? ANSWER: Makes objects that are under water look closer to the surface than they really are.

28. QUESTION: Describe how Sound Waves travel through solids. ANSWER: Particles in the medium are pushed together and move apart as the sound waves travel through them.