Troposphere
Atmosphere

What Is the Troposphere?

The troposphere is the lowest layer of the atmosphere. It starts at ground level and extends upwards to about 13 km. All weather occurs in the troposphere. […]

Stratosphere
Atmosphere

What Is the Stratosphere?

Main highlights of the stratosphere are: (1) The ozone layer absorbs harmful UV light (2) This causes temperature to rise (3) It contains 10% of air mass. […]

Exosphere
Atmosphere

What Is the Exosphere?

The exosphere is the upper part of Earth’s atmosphere. It starts at about 500 km and gradually extends into the vacuum of outer space at about 190,000 km. […]

Mesosphere
Atmosphere

What Is the Mesosphere?

Highlights of the mesosphere include: (1) Air is very thin (2) It’s the coldest region of the atmosphere close to -100°C and (3) It’s where meteors burn up. […]