geography term 1

what are the 4 sections planet earth is divided into

• troposphere, stratosphere, mesosphere, thermosphere
• atmosphere, lithosphere, hydrosphere, biosphere
• crust, outer core, inner core, asthenosphere
• crust, mantle, outer core, inner core

what is air

• colorless, tasteless, ordorless, mixture of gases

• gas around the earth

• nothing

about 78% of air is

21% of air is

about 0.04 of air is

what is the importance of air

• it gives us oxygen

• it gives plants carbon dioxide

• it protects the earth from the heat from the sun

• it keeps water vapor from evaporating into space

• it extends to outer space and has no definite end

what is nitrogen needed by

• animals

• plants

• both plants and animals

• nothing

what breaks down nitrogen in the atmosphere

• hurricane

• lighting

• the sun

• moon eclispe

what is trospshere

name the main components of air

• nitrogen, oxygen, carbon dioxide
• helium, argon, neon
• hydrogen, methane, sulfur dioxide
• water vapor, ozone, nitrogen dioxide