9. Sound will travel slowest through which of the
following forms of matter (media)?
A. Milk
B. a desk
C. air
D. a door
10. Sound travels FASTEST through which of these
materials?
A. Air
B. Empty space
C. Metal
D. Water
11. In a transverse wave, particles of the medium
move_______to the direction the wave
is traveling
A. back and forth (left and right)
C. parallel
B. perpendicular (at 90 degrees)
D. wherever the wave is going
12. Describe what is happening at the left end of
the electromagnetic spectrum shown above?
A. high frequency, high energy waves
C. long wavelength, high energy waves
B. long wavelength, low energy waves
D. low frequency, high energy waves
13. A rainbow is an example of a light's ________.
A. Refraction
B. reflection
C. electromagnetic wave
D. law
14. The study of light is called ______.
A. Prism
B. optics
C. spectrum
D. reflection​