Earth's Atmosphere study Guide

Layers

100

What is the lowest layer of the atmosphere?

Troposphere

200

What is the highest layer of the atmosphere?

Exosphere

300

What is the 4th layer of the atmosphere from the ground?

Thermosphere

400

What is the 2nd layer of the atmosphere from the ground?

Stratosphere

500

What is the 3th layer of the atmosphere?

Mesosphere

Composition

100

What is the gas with the most of it in the atmosphere?

Nitrogen

200

How much Nitrogen is in the atmosphere?

78%

300

What gas in the atmosphere do we breath?

Oxygen

400

How much Oxygen is in the atmosphere?

21%

500

How much of other gasses are in the atmosphere?

1%