|Exosphere - The last layer and the thinnest. It goes all the way to 10,000 km above the Earth's surface.
|Thermosphere - The thermosphere is next and the air is very thin here. Temperatures can get extremely hot in the thermosphere.
|Mesosphere - The mesosphere covers the next 50 miles beyond the stratosphere. This is where most meteors burn up upon entry. The coldest place on Earth is at the top of the mesosphere.
|Stratosphere - The stratosphere extends for the next 32 miles after the troposphere. Unlike the troposphere the stratosphere gets its heat by the Ozone Layer absorbing radiation from the sun. As a result, it gets warmer the further away you get from the Earth. Weather balloons go as high as the stratosphere.
|Troposphere - The troposphere is the layer next to the ground or surface of the Earth. It covers around 30,000-50,000 feet high. This is where we live and even where planes fly. Around 80% of the mass of the atmosphere is in the troposphere. The troposphere is heated by the surface of the Earth.
happens in the bottom layer of the atmosphere called the troposphere.
Air Masses Animation
comes from two things: the sun
and the moisture (wetness) in the air. They form clouds, to make rain and cause winds
In cold air in the sky,
rain clouds form.
Warm air rises up from
the Earth. It carries water vapor from the ocean, lakes and rivers
into the sky.
Then the water vapor cools
and tiny water drops form around the tiny specs of dust in the air.
They bang together and
grow in size until they're heavy enough to fall. This is rain.
How Precipitation Forms
Cloud Identification Movie
are three main types of clouds:
clouds look like a heap of cotton balls or whipped cream.
Stratus clouds look like a flat blanket in the sky.
Cirrus clouds look like curls of white hair.
Snowflakes form when water
vapor freezes into ice crystals in cold clouds.
They get heavy and fall.
If the air is cold enough, the snow falls all the way to the earth
If the ground is freezing,
the snowflakes stick to the ground.
click to see compacted snow
warm air and cold air get together in thunder clouds it forms
static electricity. This
big charge of electricity can travel to the ground or to other clouds.
is over 40,000 degrees. So a bolt of lightning makes the air around
it get bigger. Thunder is the sound caused by the air growing bigger.