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.

escape velocity

What is Earth’s Escape Velocity?

The escape velocity of Earth (11.186 km/s) is the speed at which a free object must travel to escape into space from the planet’s gravitational pull.

Seasonal Patterns

Why Do We Have Seasons?

Because the Earth is tilted on its axis, it’s why we have seasons. When Earth receives more sunlight on one side, it’s summer. And vice versa for winter.


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.

Earth Atmosphere Layers

What Are the Layers of the Atmosphere?

There are 4 primary layers of the atmosphere on Earth: troposphere, stratosphere, mesosphere and thermosphere. The ionosphere and exosphere are above those.

Earth Rotation

Earth Rotation: The Day-Night Boundary

As the Earth spins, the sun always shines on one side which gives it sunlight. When you’re facing the sun, it’s daytime. But when you’re not, it’s night.


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.