The study of the atmosphere and weather conditions is known as ______.

Which of the following gases is NOT a part of the atmosphere?

This is really a very thin layer that surrounds Earth and is kept in place by the gravitational pull of the Earth.

This is where most meteoroids burn up and where you can see the trails of meteors.

This level of the atmosphere extends from the surface of the Earth upwards for approximately 7 miles making it the level in which we and all life lives.

This light show phenomenon occurs when particles from the sun enter into the Ionosphere near either the North Pole or the South Pole.

This does not have a definite outer limit meaning that it doesn’t just suddenly end but rather extends outward into space.

Most commercial airplanes fly in this layer of the atmosphere.

The Thermosphere extends upward from the Earth’s surface for _____ miles and then thins so that we don’t know where it ends.

The aurora borealis occurs in this layer of the atmosphere.