A) a field
B) a material medium
C) heat
D) the atmosphere

A) the energy of distant stars
B) a vacuum
C) the high energy of the Sun
D) artificial lights

A) energy that moves as EM waves
B) speed of EM waves in a vacuum
C) motion of a medium caused by EM waves
D) conversion of EM waves into kinetic energy

A) depends on the source of the waves
B) increases as the amount of energy increases
C) decreases as the waves spread out
D) always remains constant

A) are refracted
B) are reflected in many directions
C) convert electromagnetic energy into heat
D) pass through the water without interacting with it

A) microwaves
B) radio waves
C) ultraviolet light
D) x-rays

A) ultraviolet light
B) gamma rays
C) x-rays
D) radio waves

A) radio waves
B) microwaves
C) x-rays
D) ultraviolet light

A) infrared light
B) ultraviolet light
C) microwaves
D) radio waves

A) microwaves
B) ultraviolet light
C) radio waves
D) visible light

A) x-rays
B) ultraviolet light
C) radio waves
D) microwaves

A) radio waves
B) x-rays
C) ultraviolet light
D) microwaves