Earth's Systems Flashcards

Front

What is the atmosphere?

Back

The atmosphere is a layer of gases surrounding Earth, made mostly of nitrogen and oxygen, and contains water vapor and carbon dioxide.

Front

What does the geosphere include?

Back

The geosphere includes solid and molten rock inside Earth, soil, rock pieces, and land features like hills and mountains.

Front

What is the hydrosphere?

Back

The hydrosphere is all of Earth's liquid and solid water, including oceans, lakes, rivers, glaciers, and ice caps.

Front

What percentage of Earth's surface does the hydrosphere cover?

Back

The hydrosphere covers more than 70 percent of Earth's surface.

Front

What are the two forms of water in the hydrosphere?

Back

The two forms of water in the hydrosphere are salt water and fresh water.

Front

Where is most of Earth's fresh water found?

Back

Most of Earth's fresh water exists as ice.

Front

Where is most of Earth's salt water found?

Back

Most of Earth's salt water is found in the ocean.

Front

What is the biosphere?

Back

The biosphere is all of Earth's living things, found from the lower atmosphere to the ocean floor.

Front

What are the four main systems of Earth?

Back

The four main systems of Earth are the atmosphere, geosphere, hydrosphere, and biosphere.