Rivers

What percentage of the Earth's surface is covered by water?

• 25%

• 90%

• 75%

• 50%

What is the term for water found deep underground?

• Salt water

• Groundwater

• Water vapour

• Surface water

What percentage of the water on Earth's surface is salt water?

• 97%

• 75%

• 25%

• 50%

Where is most of the fresh water stored?

• Groundwater

• Oceans

• Glaciers and ice sheets

• Rivers, streams, and lakes

What is the process of water changing into small water droplets in the air called?

• Runoff

• Condensation

• Transpiration

• Evaporation

What is the term for the continual movement of water from the Earth's surface to the air and back again?

• Condensation cycle

• Evaporation cycle

• Hydrologic cycle

• Water cycle

What is the point where a river ends its flow and drains into the sea or lake called?

• River mouth

• Confluence

• Tributary

• River source

What is the area drained by a river and its tributaries called?

• River system

• Watershed

• Drainage basin

• Divide

What feature is formed when a river erodes the land as it flows from highlands to lowlands?

• Valleys

• Waterfalls

• Meanders

• Floodplains

What is the term for the bends found in the part of a river where the land is flat?

• Meanders

• Waterfalls

• Valleys

• Floodplains