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Climate and Climate Change

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Section 4: Climate Change The climate is gradually warming, and this is due to human activity. ... which can cause eye damage and skin cancer. – PowerPoint PPT presentation

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Title: Climate and Climate Change


1
Chapter 9
  • Climate and Climate Change

2
Section 1 What causes climate?
  • Climate is the long-term, average conditions of
    temperature, precipitation, winds, and clouds in
    an area.

3
2 Factors of Climate
  • 1. Temperature is influenced by latitude,
    altitude, and the ocean.

4
2 Factors of Climate
  • 2. Precipitation is influenced by winds and
    mountains.

5
Winds and Clouds
  • The windward side of a mountain is rainy and
    snowy.
  • The leeward side of a mountain is dry.
  • A monsoon is a seasonal period of heavy rain

6
The Seasons
  • The seasons are caused by the tilt of the Earths
    axis as Earth travels around the sun.

7
Vocabulary Illustration
  • In your notebooks, for each word listed
  • Write the word
  • Write the definition
  • Draw and color a small picture

Climate Microclimate Tropical Zone Polar Zone Temperate Zone
Marine Climate Continental Climate Ocean Current Windward Leeward
Monsoon El Nino La Nina Salinity Upwelling
8
Section 2 Currents and Climate
  • Surface currents, which affect water to a depth
    of several hundred meters, are driven mainly by
    winds.
  • A surface current warms or cools the air above
    it, influencing the climate of the land near the
    coast

9
El Nino
  • El Nino is a climate event that occurs every 2 to
    7 years in the Pacific Ocean, during which winds
    shift and push warm water toward South America.

10
La Nina
  • La Nina is a climate event in the eastern Pacific
    Ocean in which surface waters are colder than
    normal.

11
Deep currents
  • Deep currents move and mix water around the
    world.
  • Salinity is the total amount of dissolved salts
    in a water sample.
  • Upwelling is the movement of cold water upward
    from the deep ocean.

12
Planet Earth Video
  • Planet Earth Video Shallow Seas

13
Section 3 Climate Regions
  • Scientists classify climate according to two
    major factors temperature and precipitation.
  • Each special area of climate is called a biome.

14
8 Land Biomes
  • 1. Rain forests have large amounts of rainfall
    and a great diversity of species.

15
8 Land Biomes
  • 2. Savannas are grasslands with few trees and a
    distinct rainy season.

16
8 Land Biomes
  • 3. Deserts are the driest biomes, with little
    rainfall.

17
8 Land Biomes
  • 4. San Diego is in the chaparral biome. It has
    warm, dry summers, and cool, rainy winters.

18
8 Land Biomes
  • 5. Grasslands have few trees and long cold
    winters.

19
8 Land Biomes
  • 6. Trees lose their leaves in a deciduous forest,
    which has all 4 seasons.

20
8 Land Biomes
  • 7. The coniferous forest or taiga has mountains
    and evergreen trees, and is the biggest biome.

21
8 Land Biomes
  • 8. The tundra is treeless, and the ground is
    always frozen (permafrost).

22
Biome Map
  • Color, answer the questions, and turn in the
    Biome Map.
  • If you do not finish, it is homework.
  • If you finish early, please do questions 1 and 2
    on page 371 (PQA).

23
Section 4 Climate Change
  • The climate is gradually warming, and this is due
    to human activity.
  • This is called global warming or climate change.

24
Global Warming
  • Gases in the atmosphere that trap heat are called
    greenhouse gases.

25
Global Warming
  • People have been producing more carbon dioxide
    since the late 1800s by burning wood, coal, oil,
    and gas. This warms the Earth.

26
Effects of Global Warming
  • Because of global warming
  • Droughts and floods occur
  • Ocean levels rise
  • Oceans become more acidic, fish die
  • Storms become more frequent
  • Winters are colder, summers are hotter
  • Animals and plant go extinct
  • Soil becomes less fertile
  • Less drinking water is available

27
Ozone Depletion
  • The ozone layer protects the Earth from harmful
    UV rays.
  • Chlorofluorocarbons or CFCs cause holes in the
    ozone, which can cause eye damage and skin cancer.

28
Cool Climate Graphs Page 372
  • 1. Working in groups of 3, complete the procedure
    steps 1-6 on page 372.
  • 2. In your notebooks, complete questions 1-6 on
    page 373. PQA.

29
Review and Vocabulary
  • 1. Complete the Review Sheet.
  • 2. In your notebooks, for each word listed
  • Write the word
  • Write the definition
  • Draw and color a small picture

Rain Forest Savanna Desert Steppe Chaparral
Humid Subtropical Subarctic Tundra Permafrost Ice Age
Global Warming Greenhouse Gas Ozone Hole Chlorofluorocarbon
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