G 5 RS Water on Earth: Quiz

What percentage of Earth's water is salt water?

• 70%

• 97%

• 50%

Where is most of the Earth's fresh water stored?

• Rivers

• Glaciers

• Atmosphere

What is groundwater?

• Water stored in the atmosphere

• Water found in lakes

• Water stored in underground aquifers

Which of the following is a source of standing water?

• Streams

• Oceans

• Lakes

What is a reservoir?

• A natural lake

• An artificial lake for water storage

• A type of groundwater

What causes algal blooms?

• Too much sunlight

• Pollution, especially fertilizers

• High temperatures

What is acid rain primarily caused by?

• Natural disasters

• Gases from burning fossil fuels

• Volcanic eruptions

How can humans negatively impact water quality?

• By conserving water

• Through pollution

• By planting trees

What act was passed to protect drinking water in the U.S.?

• Clean Air Act

• Safe Drinking Water Act

• Water Quality Act

What process involves water being stored on Earth's surface?

• Erosion

• Storage

• Evaporation