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World Geography

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World Geography Chapter 3 Weather and Climate If peeing your pants is cool Consider me Miles Davis. Semiarid climate: Receive more moisture than Arid ... – PowerPoint PPT presentation

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Title: World Geography


1
World Geography
  • Chapter 3 Weather and Climate

2
Chapter 3, Section 1 Factors that affect
climate
  • I. The Sun and Latitude
  • Tilt of the earth as the planet revolves around
    the Sun.
  • Determines which hemisphere receives the most
    direct sunlight, which causes changing seasons.
  • Suns energy
  • ½ of the energy is absorbed in the atmosphere
  • Earths surface absorbs the other ½
  • Solar (form the Sun) energy is converted into
    heat and measured according to temperature.

3
The Sun and Latitude cont.
  • Greenhouse Effect earths atmosphere traps heat
    energy.
  • The greenhouse effect helps keep the planet warm,
    but recent evidence shows that the Earth has
    gotten noticebaly warmer. What might cause this?

4
The Sun and Latitude cont.
5
  • So what activities might be causing global
    warming?
  • Eric Cartmans backside?

6
  • Animals?

7
  • No, humans probably, activities like
  • 1. Burning coal or fossil fuels.

8
  • The oil industry

9
  • Burning oil, coal, natural gas, and other fossil
    fuels add CO2 to our atmosphere. And CO 2
    absorbs heat, thus raising the temp.

10
II. Atmospheric Pressure
  • The air around you is constantly pushing you, a
    force called atmospheric pressure, or air
    pressure.
  • As you climb a mountain, there is less air
    pushing you down, thus the air gets thinner is
    harder to breath as humans.

11
Air pressure cont.
  • At such high altitudes, air is too thin to
    breath, that is why planes are air sealed and
    pressurized.
  • When you fly on a plane, your ears pop because of
    the changes in air and cabin pressure.

12
  • Hopefully this doesnt happen to you on a plane,
    because of the air pressure change.

13
Air pressure cont.
  • Low pressure area when air is heated it expands,
    becomes less dense, and rises, creating a low-
    pressure area. As the air rises and cools, the
    water vapor it carries forms into clouds.
  • Low pressure usually accompanies unstable weather
    conditions.
  • Centers of low pressure are called cyclones.

14
  • Cold air is dense and sinks towards Earths
    surface, creating centers of high pressure.
  • High pressure systems usually bring more stable
    weather conditions.

15
Global Wind Belts
16
Global wind belts cont.
  • Prevailing winds winds that blow from the same
    direction most of the time.
  • Sailors use the prevailing winds to guide trips.
  • The zone of winds along the equator is calm, with
    no prevailing winds called the doldrums.

17
Global wind belts cont.
  • A front occurs when two air masses of vastly
    different temperatures collide.

18
III. Oceans and Currents
  • Oceans also affect climate.
  • Location in respect to an ocean changes climate.
    Landlocked areas will be cooler than locations
    near oceans because of warm currents that carry
    heated waters.

19
Chapter 3, Section 2, Weather Factors
  • I. Precipitation
  • The process with which water changes from liquid
    to a gas is called evaporation.
  • The amount of water vapor in the air is called
    humidity.
  • Condensation is the process with which water
    vapor changes from gas to a liquid.

20
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21
Storms
  • Hurricanes the most powerful and destructive
    tropical cyclones.
  • Typhoons hurricanes in the Western Pacific Ocean
    areas (Asia).
  • Tornadoes twisting spirals of air in the middle-
    latitude areas.
  • The U.S. has more tornadoes than any other
    country.

22
  • So, weather, how bout it?

23
Section 3.3 Climate and Vegetation Patterns
  • Tropical Climates
  • Tropical Humid Climates
  • Example Vietnam, Indonesia
  • Areas close to the equator
  • They never have truly cold weather.
  • Because the warm air is always rising, this
    unstable air leads to almost daily thunderstorms
    and heavy rainfall.
  • In some parts of the tropical humid climates all
    rainfall is concentrated into a wet season,
    similar to

24
Conditioner is better, I make the hair silky and
smooth.
25
Section 3.3 cont
  • Tropical wet and dry climates
  • Just to the N and S of the tropical humid
    climate.
  • Also called the tropical savanna climate.
  • A savanna is an alternating pattern of wet and
    dry season.

26
Section 3.3 cont
  • Dry Climates
  • Arid climates stable sinking dry air all year.
  • Locations include Mexico, Southern Africa, and
    South America for example.
  • Soils tend to be thin and rocky.

27
  • Since this topic can be so
  • Dry
  • Zing!
  • Its time for one of Steckens riddles
  • Try to figure out the answer to the following
    pictures by combining them.

28
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29

30
  • Considering something In deep thought

31

32
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33
  • Any ideas????

34
  • If peeing your pants is cool Consider me Miles
    Davis.

35
  • Semiarid climate
  • Receive more moisture than Arid climates but less
    than more humid areas.
  • Humid subtropical climate
  • Found on the eastern side of continents where
    there are warm air ocean currents.
  • Usually contains forests.

36
Section 3.3 cont
  • Deciduous forests trees that lose their leaves
    during part of the year
  • Coniferous forests remain green all year.

37
Section 3.3 cont.
  • High latitude climates-
  • Subarctic climate Canada, Greenland, Northern
    Russia, parts of northern Europe.
  • Cold climate, but also supports vast evergreen
    forests.
  • Tundra climate permanently frozen soil called
    permafrost.

38
Section 3.3 cont
  • Ice Cap climate found on Earths polar regions.
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