1. Recognize the connection between the sun’s energy and the wind.
SPI
Recognize the connection between the sun’s energy and the wind.

2. Characteristics of the Atmosphere
Atmosphere is a mixture of gases that surrounds Earth.
It protects us from the sun’s damaging rays.
The atmosphere is constantly changing because of our actions on Earth.

3. Characteristics of the Atmosphere
78% of Earth’s atmosphere is made up of Nitrogen.
21% is made up of Oxygen.
1% is made up of several different gases like argon and Carbon Dioxide.

4. Air Pressure

5. Air Pressure
Air pressure is the measure of the force with which air molecules push on a surface.
Like a human pyramid, air pressure increases the close it is to Earth’s surface.

6. Air Pressure