1. Ch. 3 Weather and Climate http://www.youtube.com/watch?v=lrPS2HiYVp8
The video explains how the climate system on earth works and is 3:51 min long
This video follows the flow of section 1

2. Section 1 Factors Affecting Climate
The Sun and Latitude
A. Weather is the condition of the atmosphere at a given time and place
B. Climate-weather conditions in a region over a long period of time
C. The closer you are to the tropics and the sun’s direct rays, the warmer you are…duh
Because the sun does not hit each region of the globe equally each place has a different climate
What were the three regions of the globe we studied last chapter?
Polar
Mid latitudes
Tropics
This can effect the way people live in different parts of the world and how we as humans view each place
Show picture on page 41
Texas drought 2000
How would this change your view of the region?
The sun plays a major role in the earths weather and climate patterns. It is important to remember that weather is he condition of the atmosphere given at a certain time and place. while climate is the weather conditions for a certain region over period of time.

3. Temperature-measurement of heat
Atmosphere reflects half of sun’s energy and absorbs the other half which heats up the earth
Greenhouse Effect-Earth allows sun’s heat in, traps it and slowly allows it to release into space
G. Global Warming-CO2 absorbs heat
H. Some say man is responsible while others say it’s a natural cycle
The Temperature is caused by the solar energy from the sun.
half is reflected out of the atmosphere
the rest is absorbed and converted into heat which is temperature
This process is called the green house effect
The air in the atmosphere slows the release of the heat into space
Global warming
Scientist believe caused by humans
Increase in the earth temperature
Rise in CO2 ( carbon dioxide) because of the use of coal, natural gas, and oil
CO2 absorbs heat and increases earths temperature

5. Do you know?
How does the Earth’s Atmosphere help keep the planet Warm?
Green house effect- slowing the loss of heat into space

6. Random Fact Venus and global warming The Little Ice age 1500’s -1800’s
Venus is 96 % CO2 and because of this it is 890 F
The Little Ice age 1500’s -1800’s
Venus help scientist understand the global warming on earth
Little ice age – temperature dropped 1 c

7. B. Higher you go, less pressure
Atmospheric Pressure
A. Pressure of air
B. Higher you go, less pressure
C. As air heats up, it expands, becomes less dense and rises (low pressure system)
Climate -weather in an area over a long period of time
Air has weight= air pressure
Climbing mountains
Flying planes
Air heated becomes less dense and rises+ low pressure area
Rising air usually cools and the water vapor in it is carried away to form clouds- can bring rain or storms
Because of this process low pressure usually accompanies unstable weather conditions
Cyclones anything from light breeze to heavy storm

8. G. Usually bring stable, clear and dry weather
D. Air rises, cools and forms water vapor
E. Centers of low pressure systems are called cyclones… sometimes a slight breeze while other times a powerful storm
F. High pressure systems are created from cold air sinking towards the Earth
G. Usually bring stable, clear and dry weather
Because of this process low pressure usually accompanies unstable weather conditions
Cyclones anything from light breeze to heavy storm

9. Do you Know
What kind of weather is usually associated with an area of Low pressure?
Unstable weather, anything from a slight breeze to bad storms

10. H. Look at pressure diagram on Page 43. III. Global Wind Belts
A. Wind flows from high pressure areas to low pressure areas
B. Tire
C. Prevailing winds-blow from the same direction all the time…NE and SE trade winds, westerlies, easterlies
D. Doldrums-along Equator, calm…little wind
Pressure affects wind patterns on earth
Wind flows from high pressure to low pressure areas
Think of when filling a tire the air will rush out if you let it

12. E. Front-two air masses of widely different temperatures or moisture levels meet
F. Usually results in precipitation
G. Prevailing winds up in atmosphere make up the jet stream… wind speed can reach 300 miles per hour
H. Jet streams move heat and major weather patterns

14. Do you Know?
How is wind directly related to the differences of air pressure?
Wind flows from high areas of high pressure to low pressure areas

15. A. Water heats and cools more slowly than land
Ocean and Currents
A. Water heats and cools more slowly than land
B. Locations near large bodies of water have more consistent temps then inland locations
C. Earth’s wind, rotation and temperatures create currents (great rivers of sea water)
D. Move clockwise in NH and counter in SH
California near the coast has more consistent weather will the Mid West us- it will change every five minutes
Currents move heat back and fourth between tropics and polar regions

17. Currents help balance water temperatures in the oceans by moving it all around.

18. Do you know? What are the main forces that create ocean currents?
Wind, earth’s rotation, varying ocean temperatures

19. Section 2: Weather Factors
Read to Discover
What are the common forms of precipitation, and how are they formed?
How do mountains and elevation affect weather and climate?
What are the different types of storms, and how do they form?

20. Section 2: Weather Factors
Formation of Precipitation
Condensation clouds, dew, fog, frost
Evaporation
Humidity
Rain
Snow
Sleet
Hail

21. Section 2: Weather Factors
Forms of Precipitation
Rain—Liquid formed through condensation of water vapor
Snow—Ice crystals formed in clouds
Sleet—Rain that freezes as it falls
Hail—Chunks of ice formed in storm clouds

22. Section 2: Weather Factors
Increase in elevation causes drop in temperature.
Mountains cause orographic effect: Moist air meets a barrier and is pushed upward, causing cooling, condensation, and precipitation.
Mountainside facing wind is the windward, wetter side; side facing away from wind is the leeward, drier side, called the rain shadow.

23. Section 2: Weather Factors
Types of Storms
Middle-latitude storms form when cold, dry polar air mixes with moist, warm tropical air. Examples include thunderstorms and tornadoes.
Tropical storms are usually smaller and lack fronts. Examples include hurricanes and typhoons.

24. Section 3: Climate and Vegetation Patterns
World Geography Today
3/31/2017
Section 3: Climate and Vegetation Patterns
Read to Discover
How do the two tropical climates differ?
What conditions are common in dry climates?
What climates are found in the middle latitudes?
What characterizes high-latitude and highland climates?
Chapter 3

25. Tropical Humid Climate Tropical Wet and Dry Climates
Section 3: Climate and Vegetation Patterns
Tropical Humid Climate
Tropical Wet and Dry Climates
Close to equator
Warm temperatures
Rainfall all year
Receives Sun’s rays directly all year
Rising warm air
Rain forests
Monsoons
North and south of tropical humid
Caused by seasonal change in this area
Alternating wet and dry seasons
Savannas

26. Section 3: Climate and Vegetation Patterns
Dry Climate Areas
Generally centered about 30 degrees north and south of equator
Subtropical high-pressure zone causes sinking dry air, with little rain.
Winters may be very cold, summers very hot.
Hardy plants and animals

27. Section 3: Climate and Vegetation Patterns
Middle-Latitude Climates
Mediterranean—Long, dry summers and mild winters; scrub woodland vegetation
Humid Subtropical—Hot, humid summers and mild winters; temperate forests
Marine West Coast—Mild all year; may support dense forests
Humid Continental—Variable, with four seasons; enough rain to support forests

28. Section 3: Climate and Vegetation Patterns
High-Latitude and Highland Climates
Subarctic—Long, cold winters and short, warm summers; vast evergreen forests
Tundra—Long winters, with permafrost; low shrubs, lichens, mosses, ferns
Ice Cap—Polar climates; few land plants or animals
Highland—Varies by elevation, with low elevations relatively mild and high elevations similar to ice cap