Atmosphere
TRUE or FALSE?
The main source of Earth's heat and energy.
The Sun
TRUE or FALSE?
FALSE
Hot air goes
UP
An envelope of gases surrounding Earth or another planet.
Atmosphere
The lowest layer of the atmosphere (where we live).
Thermosphere
Exosphere
Troposphere
Troposphere
TRUE or FALSE?
FALSE
Some heat escapes back to space
Water holds on to its heat longer than land.
TRUE or FALSE?
TRUE
Cold air goes
DOWN
Water which collects in droplets on a cold surface.
Condensation
The number of atmospheric layers.
5
This area of Earth is always the warmest.
The equator (center)
If a surface is warm (water or land) what will the temperature of the air above it be like?
Warm
Why does cold air go down?
It is more dense (heavier) and sinks.
The process of turning water from liquid into vapor.
Evaporation
A gas found in the atmosphere that protects Earth from the Sun's radiation.
Ozone
These areas of Earth are always the coldest.
Poles (north and south)
Why does the air above a surface (land or water) have the same temperature as the surface itself?
The heat from the surface rises and changes the air temperature above it.
The most abundant gas in the atmosphere
Nitrogen
The four important jobs of the atmosphere.
Keep Earth warm/cool, keep oxygen here, protect Earth from asteroids, protect Earth from Sun's radiation
Why are the poles always cold and the equator always warm?
Why does land and water heat and cool at different rates?
Land is less dense than water, which means it can heat up faster, but also cools faster.
Explain how different temperatures cause winds to blow.
Warm air rises and cold air moves in to take its place. This movement of cold air is wind.
The trapping of the Sun's warmth by a planet's atmosphere
Greenhouse effect