7UCA U1Q1 Backup - Atmospheric Composition & Layers

How does the temperature in the mesosphere change as the altitude increases?

• The temperature increases.

• The temperature decreases.

• The temperature remains the same throughout.

• The temperature increases and then decreases.

Which layer of the atmosphere contains the ozone layer?

• The stratosphere

• The troposphere

• The thermosphere

• The mesosphere

The temperature in the troposphere, the lowest layer of Earth's atmosphere, ranges from 17°C to −51°C, decreasing as altitude increases. However, in the layer above the troposphere, the stratosphere, the temperature gradually increases to −15°C as the altitude increases. Why does the temperature increase with altitude in the stratosphere?

• because ozone reflects energy from the Sun

• because ozone absorbs energy from the Sun

• because meteoroids break apart in this layer

• because meteoroids absorb light in this layer

The table shows things often found in Earth's atmospheric layers.

Using this table, which layer is the closest layer to the Earth?

• troposphere

• stratosphere

• mesosphere

• thermosphere

The table below shows the concentration of gases found in Earth's atmosphere.

How does the oxygen in the atmosphere help protect and support life on Earth?

• It is removed from the atmosphere by bacteria and lightning.

• It provides the gravity that all things need to keep from floating away.

• It is removed from the atmosphere by green plants.

• It is released by plants and provides the air necessary for the survival of living organisms.

Which of the following lists the gases in Earth's atmosphere from greatest to least amount?

• nitrogen, oxygen, argon, carbon dioxide

• oxygen, nitrogen, carbon dioxide, argon

• carbon dioxide, nitrogen, argon, oxygen

• argon, carbon dioxide, oxygen, nitrogen

The pictures show a greenhouse and Earth's atmosphere.

How are a greenhouse and Earth's atmosphere most alike?

• Both contain large amounts of carbon dioxide.

• Both lower the temperature to be suitable for life.

• Both trap heat inside and prevent it from escaping.

• Both prevent harmful radiation from reaching Earth.

Which atmospheric layer has the highest temperature?

• mesosphere

• stratosphere

• thermosphere

• troposphere

Which layer of the atmosphere is being described in the passage?

• the mesosphere

• the stratosphere

• the thermosphere

• the troposphere

Which layer of the atmosphere has the coldest temperatures and usually have meteoroids burn up in it?

• exosphere

• mesosphere

• stratosphere

• thermosphere