Question

1 what might happen if earth did not have an atmosphere?
a everything on earths surface would fly off into space
b earth would be hit with more meteors and radiation
c earths rotation would stop
d the seasons would be longer

2 why is the ozone layer important?
a it traps most of the suns heat
b it contains most of earths oxygen
c it blocks harmful uv rays
d it allows uv rays to warm the stratosphere

3 which region of the atmosphere is filled with charged particles?
a troposphere
b mesosphere
c ionosphere
d exosphere

4 which statement about earths atmosphere is true? choose two.

• oxygen is the most abundant gas in earths atmosphere
• gases in the stratosphere protect living organisms from uv radiation
• wavelength affects the color of light and how atmospheric gases interact with the light
• earths atmosphere absorbs visible light most efficiently

Explanation:

• Question 1: The atmosphere acts as a shield. Meteors burn up in the atmosphere, and it also protects from harmful radiation. Without it, Earth would be hit with more meteors and radiation.
• Question 2: The ozone layer is in the stratosphere and blocks harmful UV rays.
• Question 3: The ionosphere contains charged particles.
• Question 4: Nitrogen is the most abundant gas in the atmosphere, not oxygen. The stratosphere has the ozone layer which protects from UV. Wavelength affects light - gas interaction. The atmosphere does not absorb visible light most efficiently.

Answer:

1. B. Earth would be hit with more meteors and radiation
2. C. It blocks harmful UV rays
3. C. Ionosphere
4. Gases in the stratosphere protect living organisms from UV radiation; Wavelength affects the color of light and how atmospheric gases interact with the light