Wednesday, October 21, 2020

4 spheres definition

 Hydrosphere

The hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air. A planet's hydrosphere can be liquid, vapour, or ice. On Earth, liquid water exists on the surface in the form of oceans, lakes and rivers.

Biosphere

The biosphere is defined as the area of the planet where organisms live, including the ground and the air. An example of the biosphere is where life occurs on, above and below the surface of Earth. 

Atmosphere

An atmosphere is the layers of gases surrounding a planet or other celestial body. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one per cent other gases.

Geosphere

The geosphere is considered that portion of the Earth system that includes the Earth's interior, rocks and minerals, landforms and the processes that shape the Earth's surface.