Earth's spheres

Front

What are the four main spheres of Earth?

Back

The four main spheres of Earth are the biosphere (living things), geosphere (land), hydrosphere (water), and atmosphere (air).

Front

What is the biosphere?

Back

The biosphere is the part of Earth where living organisms exist, including land, water, and the atmosphere.

Front

What is the geosphere?

Back

The geosphere is the solid part of Earth, including rocks, soil, and landforms.

Front

What is the hydrosphere?

Back

The hydrosphere includes all the water on Earth, such as oceans, rivers, lakes, and groundwater.

Front

What is the atmosphere?

Back

The atmosphere is the layer of gases surrounding Earth, essential for life.

Front

How do the biosphere and geosphere interact?

Back

Plants grow in the soil (geosphere) and are part of the biosphere, showing interaction between living things and land.

Front

How do the atmosphere and biosphere interact?

Back

Wind (atmosphere) can move trees and spread seeds, showing interaction between air and living things.

Front

What gas makes up most of the atmosphere?

Back

Nitrogen makes up about 78% of the Earth's atmosphere.

Front

Why is oxygen important for living things?

Back

Living things need oxygen to survive and grow.

Front

What happens if the amount of oxygen in the atmosphere changes?

Back

A change in oxygen levels can significantly affect living organisms and ecosystems.