GRADE (7) UNIT 4 LESSON 2

What are physical patterns on Earth?

• Only the patterns of mountains and valleys

• Repeated patterns of physical events on Earth

• Weather patterns exclusively

• Ocean current movements only

What percentage of Earth's water is saltwater?

• 87%

• 3%

• 75%

• 97%

Which process describes how mountains are formed?

• Wind erosion

• Water cycle

• Plate tectonics

• Surface runoff

What is groundwater?

• Water in lakes and rivers

• Water vapor in the atmosphere

• Water stored in spaces between rocks and soil

• Water in the oceans

At what temperature does water freeze?

• -10 degrees Celsius

• 100 degrees Celsius

• 0 degrees Celsius

• 32 degrees Celsius

What percentage of Earth's freshwater is found in icecaps and glaciers?

• 30.1%

• 0.3%

• 68.7%

• 11%

How is a valley formed?

• By volcanic activity

• Through water and wind erosion

• By earthquake activity

• Through plant growth

What is the process of removing salt from seawater called?

• Purification

• Filtration

• Evaporation

• Desalination

What percentage of fresh surface water is found in lakes?

• 2%

• 11%

• 87%

• 30%

How are plains typically formed?

• By sediment deposition from rivers

• By volcanic explosions

• By earthquake activity

• By wind erosion only