Life in Our Solar System

What 2 gases make up earth's atmosphere?

• Nitrogen and Carbon Dioxide

• Nitrogen and Oxygen

• Oxygen and Helium

• Hydrogen and Carbon Dioxide

What is the purpose of greenhouse gases?

• They trap the heat from the sun to keep the earth warm.

• They trap the atmosphere.

• They protect us from meteoroids

What affect's earth's gravitational pull?

• Location in the Solar System

• The Mass of the planet

• The atmosphere of the planet

• The sun

What is microgravity?

• Too much gravity holding you down

• Very little gravity making you float

All spacesuits have insulation (Hint: Insulation regulates temperature inside the suit)

• True

• False

Why do spacesuits have insulation?

• To control the body temperature

• To protect us from meteoroids

• To protect us from the sun

What is the purpose of the ozone layer?

• To keep us from getting hit by meteoroids.

• To protect us from the sun's harmful ultraviolet radiation rays

• To help us breathe

How much percentage of nitrogen does the earth's atmosphere hold?

• 21%

• 78%

• 96%

• 42%

How much percentage of oxygen does the earth's atmosphere hold?

• 18%

• 78%

• 21%

• 43%

Ultraviolet radiation rays from the sun can cause sunburn, tanning, and skin cancer.

• True

• False