Quarter 3 CSA Review

Compared to the Earth, Earth's atmosphere is ___.

• very thick

• very thin

• the same size as Earth

• only covers a small area

Compare the amount of nitrogen with the amount of oxygen in the atmosphere.

• There is more than 3 times as much oxygen as there is nitrogen.

• There is less than 3 parts nitrogen.

• There is more than 3 times as much nitrogen as there is oxygen.

• The amount of nitrogen and oxygen are about equal.

The layer in our atmosphere in which weather occurs and contains 70% of all atmospheric gases is the ___.

• mesosphere

• stratosphere

• thermosphere

• troposphere

Tags

NGSS.MS-ESS2-5

Which gas is dangerous at Earth’s surface but is helpful to us in the upper atmosphere?

• Oxygen

• Ozone

• Nitrogen

• Water vapor

Which layer of the atmosphere is represented by the letter C?

• thermosphere

• mesosphere

• stratosphere

• troposphere

Which of the following is not a reason the Earth’s atmosphere makes the planet suitable for living things?

• Protects the Earth from meteorites.

• Increases the amount of gravity on Earth

• Allows for liquid water to exist on Earth.

• Provides gases for living things on Earth to breathe

The main layers of the atmosphere are classified according to how they change in ___.

• air pressure

• temperature

• altitude

• concentration of ozone

When climbing a high mountain, you get out of breath easily because ___.

• it is too cold

• the air is denser high in the mountains

• the air is less dense and the oxygen molecules are spread farther apart

• air pressure is greater in the mountains

Earth is kept warm enough to sustain life by solar energy. The sun’s energy is constantly being absorbed and radiated back out to space. This cycling of thermal energy is kept in balance by —

• just the land surfaces.

• only the large bodies of water.

• Earth’s atmosphere.

• all of these working together.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-5

Which layer of Earth’s atmosphere experiences the greatest air pressure?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere