UNIT 2 Review - 2 answers

Front

What causes an apple to appear green?

Back

An apple is green because it absorbs all colors of visible light but reflects green light.

Front

What property of light is illustrated when a ray of light enters a pond?

Back

Refraction.

Front

What describes electromagnetic radiation with a long wavelength?

Back

It has a low frequency and can travel through empty space.

Front

How does the temperature of Rigel compare to Betelgeuse?

Back

Rigel is hotter than Betelgeuse because blue stars are hotter than red stars.

Front

What variable should be investigated to observe how waves travel at different speeds?

Back

The type of matter through which the waves travel.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another.

Front

What is the relationship between wavelength and frequency?

Back

As the wavelength increases, the frequency decreases.

Front

What is electromagnetic radiation?

Back

Electromagnetic radiation is energy that travels through space as waves.

Front

What is the difference between absorption and reflection of light?

Back

Absorption is when light is taken in by a material, while reflection is when light bounces off a surface.

Front

What color of stars is typically the hottest?

Back

Blue stars are typically the hottest.