Water Cycle and Atmosphere

Which of these describes the atmosphere of Earth?

• all the water on Earth

• layer of melted rock in Earth

• the solid part of Earth

• blanket of air and dust around Earth

Which gas makes up 78% of Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Gas

Which 2 gases are the most common that are found in Earth's atmosphere?

• oxygen and carbon dioxide

• nitrogen and oxygen

• carbon dioxide and nitrogen

• nitrogen and helium

How does the amount of nitrogen compare to the amount of oxygen in Earth's atmosphere?

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

• The atmosphere is only made of water vapor.

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

• The amounts of nitrogen and oxygen are about equal

Where does weather take place?

• Troposphere

• Exosphere

• Stratosphere

• Mesosphere

What is evaporation?

• When water vapor turns into liquid.

• When liquid water turns to water vapor.

• When water vapor turns into tiny water droplets.

• When liquid water turns into a cloud.

What is runoff?

• Water falls to Earth, and it flows over land into lakes and streams.

• When water falls as rain, snow, sleet, or hail.

• When water turns into water vapor.

• When vapor turns into clouds.

When a glass of sweet tea has tiny droplets of water on the outside of the glass, this is an example of

• precipitation

• condensation

• evaporation

• runoff

When a towel is left outside to dry by the Sun, which process helps of the water cycle helps dry the towel?

• condensation

• evaporation

• precipitation

• runoff

Which type of precipitation can you find in freezing temperatures?

• rain

• fog

• snow

• clouds