Define earth system Select a lesson
 

The four major earth spheres of the earth system
The earth systems Explain Earth systems analysis
The hydrosphere in the earth systemThe geosphereThe biosphere The atmosphereHow do the earths spheres interact
spheres of the earth



SUGGESTED LESSONS
Aquaculture
Climate Change
Ecosystems
Food Waste
Forest Preservation
Genetic Engineering
Landforms
Natural Resources
Ocean Acidification
Overfishing
Ozone Depletion
Pollution
Renewable Energy
Waste Water

Water Scarcity
Waste and Recycling
Hydrosphere, Geosphere,  atmosphere,  cryosphere,  Biosphere,


The Geosphere

This sphere includes all the stuff that make up the crust and the core of the earth. It includes everything natural and lifeless that make up the surface of the earth.

Examples are all the rocks and sand particles from dry land to those found at the bottom of the oceans. They also include the mountains, minerals, lava and molten magma from beneath the earth’s crust.

The geosphere undergoes infinite processes constantly and that, in turn, modifies other spheres. One example of the continuous process is the rock cycle.

Consider the rock cycle illustration below:

The rock cycle in a volcano

In the rock cycle, melted rock from below the earth’s crust is spewed out through vents on the surface onto the surface of the earth. This is also called lava. Solidified lava, together with other rock material from earth movements are weathered and eroded. The eroded particles end up somewhere and build up. After many years of buildup, pressure from the overlying weight causes the particles to modify itself again. They are further buried deeper in the crust and then melted again by intense heat until they are spewed out to the surface again.

In this cycle, you will notice that it can take thousands of years for the cycle to complete, but every single day has a role to play. You will also notice that the cycle does not complete on its own. It is influenced by other factors such as water, temperature, and wind, which also belong to other spheres.

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earth systems thinking