UNIT THREE: Matter, Energy, and Earth. Chapter 8 Matter and Temperature Chapter 9 Heat Chapter 10 Properties of Matter Chapter 11 Earth’s Atmosphere and Weather. Chapter Eleven: Earth’s Atmosphere and Weather. 11.1 Earth’s Atmosphere 11.2 Weather Variables
Two air masses that affect the United States are the continental polar air mass and the maritime tropical air mass.11.3 Air masses and fronts
Changing conditions and global winds cause these air masses to move.
The triangles point in the direction the front is moving.
A warm front is shown using a line marked with semicircles.11.3 Fronts
The downdraft and updraft form a type of convection cell called a storm cell within the cloud.11.3 Thunderstorms
It occurs when a spark travels between negative and positive charges.11.3 Lightning
The Saffir-Simpson Hurricane Scale is one scale used for rating hurricanes.11.3 Hurricanes
As the rotating wind pattern narrows and lengthens, it forms a funnel cloud.11.3 Tornadoes
How does Doppler radar work?