Unit 6: Earth's Systems

Which major Earth system includes rocks and minerals?

• Geosphere

• Hydrosphere

• Biosphere

• Atmosphere

Which major Earth system consists of the air and gases?

• Geosphere

• Hydrosphere

• Biosphere

• Atmosphere

Where is most of Earth's freshwater found?

• lakes

• the ocean

• rivers and streams

• In ice caps and glaciers

What type of water exists in Earth's oceans?

• Freshwater

• Saltwater

Mrs. Robertson and her husband love to spend their weekends cloud-watching. In what layer of the atmosphere do clouds exist?

• Stratosphere

• Troposphere

• Thermosphere

• Mesosphere

Last night, Charlotte looked at the sky and saw a satellite moving in space. In what layer of the atmosphere could satellites be found?

• Stratosphere

• Exosphere

• Thermosphere

• Troposphere

What percentage of freshwater is found in rivers, lakes, and streams?

• 2%
• 5%
• 10%
• Less than 1%

What is the primary difference between weathering and erosion?

• Weathering and erosion are the same process.

• Weathering involves the movement of rocks, while erosion involves the breakdown of weathered materials.

• Weathering involves the breakdown of rocks, while erosion involves the movement of weathered materials.

• Weathering is caused by wind, while erosion is caused by water.

What is the name given to all the water on Earth?

• atmosphere

• hydrosphere

• lithosphere

• troposphere

Which statement is true about water on Earth?

• Most of Earth's water is salty and found in the oceans.

• Most of Earth's water is fresh water.

• Most of Earth's water is frozen.

• Most of Earth's water is found in the ground.