Earth's Systems Unit 4

The sun and the earth’s core provide the energy that drive earth’s systems.

The geosphere is composed of all of the rock that makes up Earth.

Crust, mantle (asthenosphere), core

Energy transfers from the core to the rest of the geosphere by conduction and convection.

As rock heats up, it becomes less dense and convection causes it to rise upward toward the crust. In contrast, as rock cools it gets denser and sinks deeper into the mantle.

The hydrosphere is composed of all the water on the earth.

The flow of energy causes changes in density, which is indicated by the convection cells in this system.

The sun is the likely source of the flow of energy.

The cryosphere

The density in the water decreased when the water was heated. Density increased when the water cooled.