8.E.1 (Hydrosphere) Review

Front

What percentage of Earth's water is salt water?

Back

97% of Earth's water is salt water.

Front

What percentage of Earth's water is freshwater?

Back

3% of Earth's water is freshwater.

Front

What is a watershed?

Back

A watershed is an area of land that all drains to one place.

Front

What happens when a large amount of fertilizer enters a lake?

Back

The number of fish dying in the lake will increase.

Front

What is turbidity?

Back

Turbidity refers to the cloudiness or haziness of a fluid caused by large numbers of individual particles.

Front

How does high turbidity affect water temperatures and dissolved oxygen levels?

Back

High turbidity will likely increase water temperatures and decrease dissolved oxygen levels.

Front

Why is filtration important in water treatment?

Back

Filtration removes small particles from the water.

Front

What is the main source of freshwater on Earth?

Back

Most of the freshwater on Earth is found in ice caps and glaciers.

Front

What is an aquifer?

Back

An aquifer is a geological formation that can store and transmit water.

Front

What is the role of dissolved oxygen in aquatic ecosystems?

Back

Dissolved oxygen is essential for the survival of fish and other aquatic organisms.