Layers of the Atmosphere

The layer of the atmosphere closest to the Earth's crust is called the

• troposphere

• stratosphere

• thermosphere

• exosphere

In the stratosphere, as the altitude increases, temperature ___________

The middle layer of the atmosphere is called the

Weather conditions occur in which layer?

• stratosphere

• exosphere

• thermosphere

• troposphere

In the mesosphere, as the altitude increases, the temperature

The part of the atmosphere that protects us from UV and other cosmic radiation is called the

What happens to the air pressure as you move up through the atmosphere

• increases

• increases then decreases

• decreases then increases

• decreases

In the troposphere, as the altitude increases, the temperature

• decreases

• increases

• stays the same

• increases then decreases

Which is the hottest layer of the atmosphere?

• troposphere

• mesosphere

• stratosphere

• thermosphere

Which gas is the most abundant (the most of) in our atmosphere?

• helium

• nitrogen

• oxygen

• carbon dioxide