Ch 9 Our Planet-Earth

What are the major gases of the atmosphere?

• carbon dioxide and water vapor

• nitrogen and carbon dioxide

• nitrogen and oxygen

• oxygen and water vapor

Which reservoir holds the largest amount of freshwater?

• groundwater

• ice

• lakes

• rivers

This diagram shows the water cycle. Which number represents precipitation?

• 1

• 2

• 3

• 4

The diagram below shows the layers of the atmosphere. The arrow is pointing to which layer?

• troposphere

• mesosphere

• stratosphere

• exosphere

Rocks are classified according to .......

• color

• formation

• size

• structure

Which of Earth's systems includes the crust, the mantle, and the core?

• atmosphere

• biosphere

• geosphere

• hydrosphere

Which atmospheric layer includes the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Which process is occurring in the area circled in this figure?

• condensation

• deposition

• precipitation

• transpiration

Which process recycles water from the biosphere to the atmosphere?

• condensation

• deposition

• precipitation

• transpiration

How much of earth's water is freshwater?

• 1 percent

• 3 percent

• 79 percent

• 97 percent