Plate tectonics
When two continental plates pull apart, a ________________________ is formed.
Rift valley
At what layer do most airplanes fly at the top of?
Troposphere
Resources that will always be available.
Inexhaustible
The mid-ocean ridge occurs along a
Divergent boundary where sea-floor spreading takes place.
What is the atmosphere?
A layer of gas surrounding a planet or moon.
Resources that can be replaced.
Renewable
Subduction is when
One plate slides under another
What gas makes up around 21% of our atmosphere?
Oxygen
Managing resources to be used wisely.
Conservation
The process that continually adds new crust is:
Sea-floor spreading
What layer protects us by burning up most meteors?
Mesosphere
Resources that can not be replaced.
Non-Renewable
Pieces of Earth's crust move on top of the:
Mantle
What layer of the atmosphere has the aurora borealis in it?
Thermosphere
Are greatest renewable source for energy is
Solar Energy