1. Weather Fronts
The boundary between 2 air masses with different temperatures
Brings about a change in weather

2. Warm Front
Passes slowly through an area

3. Cold Front
Passes quickly through an area…sometimes as fast as 100 km/hr

4. Stationary Front
Can remain stalled over an area for days

5. Occluded Front

6. Website – shows animated process

8. Fronts – Another Website

9. Assignment
Complete the Compare and Contrast on page 32 and the worksheets on pages 33-34

10. Cold Fronts Warm FrontsP A R E
Both are boundary lines between 2 different air masses.
Both are formed when a warmer and a cooler air mass meet each other.
Both leave the temperature of the air different than before they arrived.
Both involve cloud formation and rain/snow.
Both create rising air. N T S
Created when a cooler air mass overtakes a warmer air mass.
Warm air rises b/c it is pushed up by the cool air and b/c it is less dense.
Steeply sloping curved line front.
Heavy rain and wind.
Passes through quickly.
Cool, dry, and clear skies after
Mainly cumulus type clouds
Created when warmer air mass overtakes a cooler air mass.
Warm air rises just b/c it is less dense.
Gentle sloping straight lined front.
Light rain and wind.
Passes through slowly.
Warm, humid, and cloudy after.
Mainly stratus type clouds.

11. Warm Front ws

12. Description of a warm front Answers to worksheet
Into/toward/over/thru
Less
Cold
Cools
Front
Cirrus
10. Sky 11. Altostratus 12. Rain 13. Snow 14. Nimbostratus 15. Freezing Rain/hail 16. Sleet 17. Rises/increases/warms

13. Cold Front ws

14. Description of a Cold Front Answers to worksheet
Slower
Denser/more dense Up
Air
Vertical
Moist
Rise
9. Thick 10. Slowly Long 13. Temperature 14. Winds 15. Thunderstorms 16. Tornadoes