1) as time passes, which of these is decreasing?
a) amplitude
b) crest
c) trough
d) wavelength

2)which graph best represents the relative speeds of electromagnetic and mechanical waves through space?
a)
b)
c)
d)

3)which of these waves would have the greatest amount of energy?
a) a
b) b
c) their energy is equal
d) there is not enough information

4)at sunset, the sun appears reddish. what is most likely the reason for this phenomenon?
a) sunlight travels through a longer distance at sunset and interacts with more particles.
eliminate
b) sunlight travels through a shorter distance at sunset and interacts with more particles.
c) sunlight travels through a longer distance at sunset and interacts with fewer particles.
d) sunlight travels through a shorter distance at sunset and interacts with fewer particles.

5)the trough of a transverse wave is best shown by choice
a) a.
b) b.
c) c.
d) d.

7)mr. mann's students were studying the properties of light in science class. he told them to put a pencil in a beaker of water, make observations, and then draw what they observed. one group drew the picture seen here. mr. mann explained that when light passes from air into the water, the light waves bend, or and the pencil appears to be broken.
a) diffract
b) reflect
c) refract
d) transact