02 03-2012-atmosphere layers1

Copy today’s date and EQ.
List three reasons why the atmosphere is important.

Atmosphere Foldable
Color the graph line to represent the temperature changes.
Blue for decreasing temperatures (getting colder)
Red for increasing temperatures (getting warmer)
Fold the diagram in half, and cut on the half line.
Glue each half on to the front of your shutter foldable.
Cut flaps on the left hand side using the horizontal lines.
Wait for directions on cutting flaps on the right hand side.

Atmosphere
The atmosphere protects us from the harmful wavelengths of light.

Notice which wavelengths are blocked! Image from https://www.e-education.psu.edu/astro801/files/astro801/image/atmos_windows_KL.jpg

Troposphere
Where weather occurs
Convection currents
Most dense layer

Stratosphere
Contains most of atmosphere’s ozone
Where jets fly

Mesosphere
Where meteors burn up
Coldest part of the atmosphere

Thermosphere
Air molecules can be 1km apart!
Up to 2,000 degrees C
International Space Station orbits at 300 km

Ozone Layer
O 3
Protects us from most of the sun’s UV radiation

Ionosphere
Helps bounce radiowaves back to Earth
Auroras happen here

Exosphere
Satellites orbit
No definite “end”

Magnetosphere
Earth’s magnetic field
Protects us from the solar wind
Without it, our atmosphere would “blow” away. Scientists think that is what happened to Mars.

Reflection Questions – Page 123
List the four main atmospheric layers.
Which layer is the most important to you and why?
What does the stratosphere protect you from?
What does the mesosphere protect you from?
Which layer acts as a giant magnet? What does it attract?
What would happen to Earth’s atmosphere if the magnetosphere did not exist?
In which layer does weather occur?
What do we determine where one atmosphere layer ends and the next one starts?

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02 03-2012-atmosphere layers1

by Janelle Wilson on Feb 03, 2012

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