1. Bellringer
A bunch of cloud droplets join together. What is this called?
Coalescence
Quiz FRIDAY, will cover

2. Weather Systems

3. Weather
Meteorology – the study of things that happen in the atmosphere

4. Weather Weather – the current state of the atmosphere
Climate – the average weather for an area over a long period of time

5. Earth’s Temperature Earth’s temperature varies due to 3 things:
Latitude
Elevation
Surface Material

6. Latitude Review: Latitude – horizontal lines that circle the Earth
Places near the equator (__o latitude) tend to be warmer than places near the poles (___ o latitude) 90

7. Latitude
The Earth is curved and sits on its axis, which means that places near the equator receive more direct sunlight (and are warmer) than places near the poles

8. Elevation
As elevation increases in the troposphere, the temperature [increases / decreases]
Therefore, mountain tops are [warmer/colder] than the base of the mountain

9. Surface Material Water heats up and cools down more slowly than land
That’s why the beach is cooler in the summer and warmer in the winter than Raleigh

10. Air Masses
This difference in air temperatures creates different air masses
Air Mass – large body of air that takes on the characteristics of the land or water under it (called the source region)

11. Air Masses
PUT A STAR BY THIS SECTION. THERE IS A SHORT ANSWER QUESTION ON YOUR QUIZ PERTAINING TO THIS INFO.

12. Air Masses Characterized two major ways: Moisture Level:
Maritime (m) – forms over water, so lots of moisture
Continental (c) – forms over land, so dry

13. Air Masses Characterized two major ways: Temperature:
Tropical (T) – warm
Polar (P) – cold

14. Air Masses 4 main air masses: Continental tropical (cT): dry and warm
Continental polar (cP): _____ and cold
Maritime tropical (mT): humid and _______
Maritime polar (mP): humid and ______
dry
warm
cold

15. Air Masses cP
Air Mass #1 -- ______
Air Mass #2 -- ______ mT

16. Air Masses
Air Mass Modification – when air masses’ temperatures and moisture levels change as they move over new regions
Here, a continental (dry) air mass becomes a maritime (wet) air mass

17. Global Wind Systems
Wind is created by the flow of air from one temperature to another temperature

18. Review
Coriolis Effect – the circular motion of air due to the Earth’s rotation
Northern Hemisphere – clockwise
Southern Hemisphere – counterclockwise
Impacts ocean currents and air and water temperatures

19. Global Wind Systems
Jet Stream – narrow band of fast, high-altitude winds
Highly influences weather in NC

20. Global Wind Systems Wind System Wind Direction Location Trade Winds
From the East
0o-30o N&S

21. Global Wind Systems Wind System Wind Direction Location Trade Winds
From the East
0o-30o N&S
Prevailing Westerlies
From the West
30o-60o N&S

22. Global Wind Systems Wind System Wind Direction Location Trade Winds
From the East
0o-30o N&S
Prevailing Westerlies
From the West
30o-60o N&S
Polar Easterlies
60o-90o N&S

23. Global Wind Systems
Doldrums and Horse Latitudes – areas between the wind systems where there is little to no wind

24. Fronts
Weather Front – narrow region separating two air masses of different temperatures and/or moisture levels
Often results in clouds, rain, or storms

25. Fronts
Cold Front – where cool, dense air meets warm air, pushing the warm air up steeply
Fastest of all front systems

26. Fronts
Warm Front – Where warm air replaces cooler air and gradually rises
Tends to move slowly and are less violent than cold fronts

27. Fronts
Stationary Front – similar air masses, so the front does not move or barely moves
“Stalled” air masses

28. Fronts
Occluded fronts – when a rapidly-moving cold air mass overtakes a warm front, wedging the warm air upward

29. Front Simulation

30. Cold air meets with warm air and pushes the warm air up steeply
Match the types of fronts with their descriptions.  A. occluded front C. warm front B. stationary front D. cold front
Cold air meets with warm air and pushes the warm air up steeply
A stalled air mass that does not move
When a warm front is overtaken by cold air and is wedged upward
When warm air gradually rises over cooler air

31. Atmosphere Review WS
This WS covers , so working on this will help you prepare for the quiz.
This is done independently
You may listen to music if you have earbuds/headphones/whatever-young-people-call them
Let me know when you are finished, I will check it
FINISH YOUR VOCAB FROM YESTERDAY AND PUT IN BASKET

36. Trade Winds Videos Discovery Ed Africa’s Trade Winds
Power of the Jet Stream (3 min)

37. Earth’s Temperature
The Sun’s radiation can be measured by heat or temperature
Temperature – the measurement of how quickly molecules move around
The faster the molecules, the higher the temperature

38. Temperature and Pressure
Heat – the transfer of energy due to the difference in temperatures between substances
Heat flows from higher temperatures to lower temperatures
Example: your seat is warm because you’ve been sitting on it

39. Temperature and Pressure
Temperature is directly proportional to pressure
High temperature  high pressure
Low temperature  low pressure

40. Temperature and Pressure
Temperature is inversely proportional to density
High temperature  low density (warm air rises)
Low temperature  high density (cool air sinks)

41. Temperature and Pressure
High pressure days tend to be sunny and clear, while low pressure days are cloudy and rainy
Happy highs, lousy lows

42. Temperature and Pressure
High-Pressure Systems – sinking air reaches the surface and spreads away from the center
Spins clockwise as it spreads away
Associated with fair weather (happy highs)

43. Temperature and Pressure
Low-Pressure Systems – air rises and other air flows towards the center to replace it
Spins counterclockwise as it moves towards the center
Associated with clouds and precipitation (lousy lows)

44. Video Questions – 3-2-1 Sheet
What are THREE things you already knew about the sky that were mentioned in the video?
What are TWO new things that you learned?
What is ONE thing that interested you?