Wednesday, 2 April 2014

The atmosphere

The atmosphere is divided into five layers. It is thickest near the surface and thins out with height until it eventually merges with space.

1) The troposphere
The troposphere is the first layer above the surface and contains half of the Earth's atmosphere. Weather occurs in this layer. Weather in this layer affects our daily life.

Between 7 to 14 kilometres.
The higher, the colder.
2) The stratosphere
Many jet aircrafts fly in the stratosphere because it is very stable. Also, the ozone layer absorbs harmful rays from the Sun.

Starts at 14 to 50 kilometres.
The higher, the hotter.
3) The mesosphere.
Meteors or rock fragments burn up in the mesosphere.

Between 50 to 85 kilometres.
The higher, the colder.
4) The thermosphere.
The thermosphere is a layer with auroras. It is also where the space shuttle orbits.

Between 85 to 640 kilometres or higher.
The higher, the hotter.
5) The exosphere.
The atmosphere merges into space in the extremely thin exosphere. This is the upper limit of our atmosphere.

640 kilometres or higher.