1. Weather Vs Climate Activity
Make a T-Chart of weather and climate
Label one side WEATHER
Label one side CLIMATE
WITHOUT ANY NOTES: 5 minute Brainstorming
Questions to Address
What are environmental and/or natural factors make up weather and climate?

2. Next… Class Challenge: Share your ideas: Class Share 5 minutes
Come up with a definition for weather and climate using factors that describe them
No note checking!
Questions to Ponder
What is weather?
What is climate?

3. Now… Class Brainstorm: Using the factors we came up with, let’s define
climate and weather.
Questions to Ponder:
WHAT IS WEATHER?
WHAT IS CLIMATE

4. Air Mass Air Mass: A large body of air Types: Moisture Temperature
Takes on the characteristics of the area it forms over.
Types:
Moisture
1). Continental
2). Maritime
Temperature
1). Arctic
2). Polar
3). Tropical

5. Coriolis effect The deflection of air caused by the Earth's rotation.
To the right above the Equator
To the left below the Equator
This combines with the heat imbalances found on Earth to create the various winds.
1). Trade winds,
2). Polar easterlies,
3). Prevailing westerlies.

6. Coriolis Effect All based on perspective
On the rotating object you see deflection
Off the rotating object, the ball appears to move in a straight line
Northern Hemisphere: Deflection always occurs to the right
Southern Hemisphere: Deflection always to the left

7. Basic wind must knows Wind is named after where it is coming from.
Examples on Board

8. 3 Main Types of Global Wind
Names
3 Surface Winds
1). Trade Winds
2). Polar Easterlies
3). Prevailing Westerlies
Trade Winds, Polar Easterlies, and Prevailing Westerlies
Named after where the come from
Rise at lows (usually warm places)
Sink at highs (ususally cold places)

9. What is a trade wind?
A global wind system that flows at 30 degrees north and south latitude, where air sinks, warms, and returns to the Equator in a westerly direction.
Cold Air Sinking at 300 and warm air rising at the equator; 00.
Label this on your diagram of the Earth

10. Trade winds Wind deflecting toward the equator from 300 North or South
Why?
This is where the warmest temperatures are ….
Remember Convection
Hit ITCZ- Band around the equator where air is converging/coming together.

11. What are the Prevailing Westerlies?
A global wind system that lies between 30 and 60 degrees north and south latitude where surface air moves toward the poles in an easterly direction; blow from west to east.
Comes out at 300 and moves toward the poles at 600
Discuss where these winds should go on your diagram with your shoulder partner…Label these on the Earth diagram.

12. Prevailing westerlies
Called a westerly because that is where the wind is blowing from…west to east
Wind Deflects from 300 to 600

13. What are the polar easterlies?
A global wind system that lies between 60 degrees latitude and the poles and characterized by very cold air.
Called Easterlies because they flow from the East to the West
Label the location of these on your Earth
diagram.

14. Polar Easterlies Wind is Deflecting from the Poles to 600.
Air is moving from a very cold location to one less cold

15. More details
If air is converging, coming together, that forms a low pressure zone.
Low Pressure = warm air that likes to rise
If air is diverging, moving away, that forms a high pressure zone.
High Pressure = cold air that sinks so it can warm

16. What is the jet stream?
High-altitude, narrow, westerly wind band that occurs above large temperature contrasts and can flow as fast as 185 km/h.
Occur when winds meet
Very different temperatures and pressures cause wind.

17. Cold front Conditions Facts Faster moving front (25-35mph)
Heavy rain possible: Warm Wet Air is rising Very quickly
Wall of cumulonimbus clouds
Winds Shift from SW – NW
Temperatures drop after the front passes.
Warm Air meets Cold Air
Warm Air is quickly pushed up a Cold Air Wall
Very Steep Slope

18. Warm Front Facts Conditions Warm Air meets Cold Air
Warm air is advancing slowly over cold air.
Much more gradual slope
Slower Moving 15-20mph
Light Rain: Since air is rising slowly
Temperatures should rise after the front passes
Wind shifts from the East to South West

19. Stationary FRONT Facts Conditions Two similar air masses meet
One is slightly warmer so it rises and stalls out over the cooler air mass
Not Moving
Same weather for days
Constant Rain

20. Occluded Front Facts Conditions
Cold fronts move faster then warm fronts….so they catch up and overtake them
Warm Air is pushed up and out of the way
Causes Rain All Around