The Earth Spheres

Front

What are the four main spheres of the Earth?

Back

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

Front

What is the atmosphere?

Back

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

Front

What is the hydrosphere?

Back

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

Front

What is the geosphere?

Back

The geosphere refers to the solid parts of the Earth, including soil, rocks, and minerals.

Front

What is the biosphere?

Back

The biosphere is the global sum of all ecosystems, where life exists on Earth.

Front

How does the hydrosphere interact with the atmosphere?

Back

The hydrosphere interacts with the atmosphere through processes like evaporation and precipitation.

Front

What is evaporation?

Back

Evaporation is the process by which water changes from a liquid to a gas, often due to heat.

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural forces.

Front

Give an example of an interaction between the hydrosphere and geosphere.

Back

An example is a river eroding its banks, which involves water (hydrosphere) wearing away soil and rock (geosphere).

Front

What percentage of Earth's atmosphere is nitrogen?

Back

78% of Earth's atmosphere is nitrogen.