The Earth’s

Structure

• The air that surrounds the earth.

• Extends about 1,000 miles above the earth’s surface.

Atmosphere

• Made up of the world’s oceans, lakes, rivers, and other bodies of water.

• Consists of 70 per cent of the earth’s surface.

Hydrosphere

• Lithosphere• Also known as the Earth’s

crust.• Makes up 30 per cent of the

Earth’s surface.

•The part of the earth where life is found.

Biosphere

Inside the Earth

• Inner Core

• Outer Core

• Mantle

• Crust

Inside the Earth

• Lies 4,000 miles below the surface of the earth.

• Believed to be solid.• Consists of Iron and

Nickel

Inner Core

• Begins about 1,800 miles below the surface of the earth.

• Made up of melted Iron and Nickel.

Outer Core

• Thick layer of dense, hot rock.

• The rock consists of silicon, oxygen, aluminum, iron, and magnesium.

Mantle

• Thin layer, extending perhaps 3 to 30 miles below the surface.

• Consists of huge plate like sections of rock that float on a partially melted layer in the upper mantle.

• Includes the continents and ocean basins.

Crust