1. Warm-Up Jan. 27, 2017
When a star is moving away from our planet, it appears to be RED. When it is moving towards our planet, it appears to be BLUE. WHY??? (Think in terms of the Doppler Effect)

2. The WAVES Bowl

3. GRUDGEBALL!!!!
1. You will divide yourself into teams. There should be four even teams.
2. Each team will have 10 X’s to begin the game.
3. Each team will be asked a question and have 1 minute to answer. If they get the question correct, they can erase two X’s from other teams or add two X’s their team total.
4. They will get a chance to shoot a free throw and erase 3 more X’s if they make the shot!
5. If a team gets a question incorrect, the next team will have a chance to steal the points (but can’t shoot if you steal points).
The team with the most X’s at the end wins!!

4. The entire electromagnetic spectrum is divided into regions by
The entire electromagnetic spectrum is divided into regions by
a. colors.
b. the way they are used.
c. wavelengths.
d. speed. c

5. Whether an object is transparent, translucent, or opaque is determined
by its ability to
a. refract light.
b. diffract light.
c. transmit light.
d. increase the speed of light. c

6. A beam of sunlight passes at an angle through a glass window
 A beam of sunlight passes at an angle through a glass window. What happens to the light?
a.  It speeds up and refracts as it is moving through the glass. b.  It slows down and reflects as it is moving through the glass. c.  It speeds up and refracts as it enters the glass and slows down and refracts as it exits the glass. d.  It slows down and refracts as it enters the glass and speeds up and refracts as it exits the glass. d

7. a. gamma rays, X-rays, visible light, microwaves, radio waves
Which of the following correctly lists electromagnetic waves in order from highest to lowest frequency?
a. gamma rays, X-rays, visible light, microwaves, radio waves
b. microwaves, infared light, ultraviolet light, gamma rays
c. gamma rays, visible light, ultraviolet light, microwaves, radio waves
d. radio waves, visible light, ultraviolet light, X-rays, gamma rays a

8. The color red that we see depends upon the
A) speed of the red light wave.
B) wavelength of the red light wave.
C) temperature of the red light wave.
D) direction of the red light wave. b

9. A) are amplified B) diffract C) reflect D) refract
You are sitting on the edge of a pool with your legs in the water. As light waves pass from the pool into the air, it looks like your legs are not attached at the knees where they meet the water. This is because light waves _______________ when they pass from one medium to another.
A) are amplified
B) diffract
C) reflect
D) refract d

10. A) the shirt produces light waves. B) the shirt releases light waves.
You can observe the color of your friend’s shirt with your eyes because
A) the shirt produces light waves.
B) the shirt releases light waves.
C) light is reflected off of the shirt.
D) light is transmitted from the shirt. c

11. An echo is the result of a
reflected sound wave c
refracted sound wave b
diffracted sound wave d
dispersed sound wave a

12. A section of a longitudinal wave where the
particles are crowded together is called a a.
rarefaction c.
vibration b.
compression d.
surface wave b

13. When the crest of one wave overlaps
the trough of another wave, this occurs a.
diffraction c.
constructive interference b.
destructive interference d.
resonant frequencies b

14. The frequency of a sound wave determines
the pitch of the sound c.
the sound quality b.
the loudness of the sound d.
the type of interference a

15. The speed of sound depends ona.
its source c.
the number of waves per second b.
the force of its compressions d.
the medium through which it travels d

16. This part of the ear has the hammer, stirrup, and anvil which increases the size of the vibrations

17. This part of the ear contains the cochlea where the movement of liquid causes the hair cells to bend

18. This part of the ear is where electrical signals are sent to the brain from the ear

19. What must an opaque object do to light that hits it in order for you to see the object?
A. change it
B. reflect it
C. refract it
D. transmit it b

20. Which part of the eye contains light sensitive cells and converts the image to electrical impulses to be sent to the brain?
A. Cornea
B. Lens
C. Retina
D. Iris c

21.  There are various types of waves, including light waves, sound waves, and radio waves. What do all waves have in common?
A.  They must travel through a medium. B.  They travel at the same speed. C.  They carry energy away from its source. D.  They can carry only a little matter. c

22. A. amplitude. B. frequency. C. crest. D. trough.
Counting the number of waves that pass a particular point in 1 second is a measure of the waves'
          A.  amplitude.           B.  frequency.           C.  crest.           D.  trough. b

23. Which color of visible light waves has the highest energy?
        A.  blue         B.  green         C.  red         D.  yellow a

24. What is the Doppler effect?
         A.  the change in the amplitude of waves coming from a moving object           B.  the change in the pitch of waves coming from a moving object           C.  the change in the intensity of waves coming from a moving object           D.  the change in the loudness of waves coming from a moving object b

25. Which sound has the highest pitch? a. one with 156 Hz
b. one with 258 Hz
c. one with 14 dB
d. one with 563 dB b

26. What is the amplitude of a wave related to? a. acceleration b. speed
c. mass
d. height d

27. If you are sitting in the back of a classroom and cannot see what’s written on the board, what vision problem do you have?
a. color blindness
b. color deficiency
c. myopia
d. hyperopia c

28. A. black B. white C. brown D. rainbow
If an object absorbs every color of light that reaches it, what color does the object appear to the human eye?
          A.  black           B.  white           C.  brown           D.  rainbow a

29. An object is placed on one side of a translucent material
An object is placed on one side of a translucent material. How does the object appear to a person on the other side of the material? A. The person sees the object clearly. B. The person sees the object, but the object appears fuzzy. C. The person sees the object, but only in black and white. D. The person does not see the object at all. b

30. Which wave represents a higher pitched sound?

31. Which wave carries the least amount of energy?b

32. A. its color B. its speed C. its frequency D. its wavelength
What property of a light ray must change in order for it to refract when it passes into a material?
          A.  its color           B.  its speed           C.  its frequency           D.  its wavelength b

33. How do vocal cords create sound?
 A.  They send out pulses of electric charge.  B.  They cause air particles to vibrate.  C.  They produce atoms that carry noise.   D.  They disturb nearby magnetic fields. b

34. A. frequency B. wavelength C. rarefaction D. amplitude
The diagram to the right represents sound waves. Which part of a sound wave is represented by part 3?
 A.  frequency  B.  wavelength  C.  rarefaction  D.  amplitude b

35. A. frequency B. wavelength C. rarefaction D. amplitude
The diagram to the right represents sound waves. Which part of a sound wave is represented by part 2?
 A.  frequency  B.  wavelength  C.  rarefaction  D.  amplitude c

36. Light sensitive cell that detects black and white shapes but not color??
a. cornea
b. iris
c. rods
d. cones c

37. The transfer of light energy to particles of matter. A. Absorption
B. Refraction
C. Diffraction a

38. The bending of a wave as the wave passes between two substances in which the speed of the wave differs
A. Absorption
B. Refraction
C. Diffraction b

39. A change in the direction of a wave when the wave finds an obstacle or an edge, such as an opening
A. Absorption
B. Refraction
C. Diffraction c

40. a. graph 1 b. graph 2 c. graph 3 d. graph 4
During a laboratory investigation, Aaron used an oscilloscope to create graphs of sounds that he produced using tuning forks. Which of these four graphs represents the sound that has the lowest volume?
a. graph 1
b. graph 2
c. graph 3
d. graph 4 d

41. a. graph 1 b. graph 2 c. graph 3 d. graph 4
Sophie also used the oscilloscope. Which of these four graphs represents the highest pitched sound?
a. graph 1
b. graph 2
c. graph 3
d. graph 4 c

42. How is the amplitude of a sound wave related to the sound you hear?
a. The large the amplitude, the higher the pitch
b. The larger the amplitude, the lower the pitch
c. The larger the amplitude, the louder the volume
d. The larger the amplitude, the softer the volume c

43. Which of the following is not a medium? a. space b. air c. water
d. wood a

44. a. The wavelength would be shorter.
If a wave is traveling at a certain speed and you decrease its frequency, what would happen to its wavelength?
a. The wavelength would be shorter.
b. The wavelength would produce a standing wave.
c. The wavelength would remain the same.
d. The wavelength would be longer. d

45. Which of these waves do NOT require a medium? a. ocean waves
b. seismic waves
c. sound waves
d. radio waves d