Saket

Definition

• Layer of gases

• Surrounds Earth

• Held by gravity

Composition

• Nitrogen – 78%

• Oxygen – 21%

• Carbon dioxide

• Water vapour

Layers

• Troposphere – Weather

• Stratosphere – Ozone

• Mesosphere – Meteors

• Thermosphere – Auroras

• Exosphere – Satellites

Functions

• Breathing

• Weather

• UV protection

• Burns meteors

• Keeps Earth warm

Importance

• Supports life

• Regulates temperature

• Clean air

Protection

• Plant trees

• Reduce pollution

• Save energy