Air as a Resource

What makes up 99% of the atmosphere?

• nitrogen
• oxygen
• carbon dioxide
• nitrogen and oxygen together

When water vapor turns into a cloud, it is doing this process

• Evaporation
• Condensation
• Precipitation
• Sublimation

What does carbon dioxide in the atmosphere do?

• it absorbs heat energy 
• it provides a place for water vapor to condense
• it absorbs harmful uv radiation 
• It protects from the solar wind

What do aerosols (particles) in the atmosphere do?

• They trap heat energy
• They provide a place for water vapor to condense
• They absorb harmful uv radiation
• They help plants grow better

What does ozone in the atmosphere do?

• it absorbs and traps heat energy
• it provides a place for water vapor to condense
• it protects against harmful uv radiation
• it helps plants grow

Air in the atmosphere is most concentrated

• at the bottom of the atmosphere, near Earth
• at the top of the atmosphere, near space

What does water vapor do in the atmosphere?

• It protects against harmful uv radiation
• it helps plants to grow
• it forms clouds and precipitation
• it protects against the solar wind

ozone is

• droplets of water
• a greenhouse gas
• tiny particles of liquids or solids
• three-atom oxygen

What holds the atmosphere on Earth so it doesn't drift away into space?

• water
• sunlight
• gravity
• moonbeams

Pressure is the effect of

• the weight of all the air above pressing down
• water vapor in the atmosphere
• greenhouse gases
• solar radiation