U1 GEOLOGY: LAYERS OF EARTH

Why is the Earth is called the "Blue Planet"?

• Because of the sky's colour.

• Because of the magnetic field.

• Because 70% of its surface is water.

• Because 21% of its atmosphere is oxygen.

It is NOT a characteristic that explain why life exist on Earth....

• the temperature is mild in average

• the gravity is neither too weak nor too strong

• the Earth' magnetic field protects it from cosmic rays and solar wind.

• Earth is the 5th planet from the Sun

All the livings organisms that live on Earth.

• Geosphere.

• Biosphere.

• Hydrosphere.

• Atmosphere

It is formed by 78% of Nitrogen and 21% of Oxygen.

• Atmosphere

• Geosphere

• Biosphere.

• Hydrosphere.

The sphere that correspondos to the IMAGE.

• Atmosphere

• Geosphere

• Biosphere

• Hydrosphere

It is made up of rocks and minerals.

• Hydrosphere

• Atmosphere

• Geosphere

• Biosphere

We consideer this molecule as ESSENTIAL for life.

• Iron

• Water

• Mineral

• Core

Surronding the mantle, we find the...

• Inner core

• Crust

• Outer core

• Hydrosphere

It is the layer of gases which surrounds the Earth.

• Biosphere

• Geosphere

• Hydrosphere

• Atmosphere

It is the thickest layer of the Earth.

It is the 85% of its total mass.

• Mantle

• Crust

• Inner core

• Core