Earth's Atmosphere

Condition of Earth's atmosphere at a particular time & place

• climate
• biogeography
• precipitation
• weather

Place energy comes from for weather on Earth

• the Earth's core
• volcanoes
• geothermal vents
• the Sun

Earth's atmosphere is held down by

• radiation
• gravity
• magnetism
• conduction

Two gases that make up 99% of Earth's atmosphere

• carbon dioxide & oxygen
• nitrogen & carbon dioxide
• nitrogen & oxygen
• nitrogen & water vapor

Number of times more nitrogen in the air than oxygen

• 2 times
• 4 times
• 10 times
• 50 times

Element needed to release energy from food

• nitrogen
• oxygen
• hydrogen
• carbon

Element that forms ozone

• nitrogen
• oxygen
• hydrogen
• carbon

Form in which nitrogen is found in the Earth's atmosphere

• solid
• liquid
• gas
• crystal

Gas that is given off as a waste product from respiration of living organisms

• oxygen
• carbon dioxide
• nitrogen
• hydrogen

Water in the form of gas is called

• ice
• graupel
• sleet
• water vapor