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Ch. 2, sec. 2 Water and Landforms

Ch. 2, sec. 2 Water and Landforms






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    Ch. 2, sec. 2 Water and Landforms Ch. 2, sec. 2 Water and Landforms Presentation Transcript

    • Bodies of Water and Landforms Ch. 2, Sec. 2
    • Oceans and Seas
      • The ocean is a connect body of salt water that covers 71% of the earth
      • Divided into 4 sections: Atlantic, Pacific, Indian and Arctic
    • Ocean Motion
      • Currents – act like rivers flowing through the sea
    • Ocean Motion
      • Waves – Swells or ridges produced by winds
    • Ocean Motion
      • Tides – regular rises and falls of the ocean created by the gravitational pull of the moon or the sun
    • Hydrologic Cycle
      • Continuous circulation of water between the atmosphere, the oceans and the earth
      • 1-water evaporates  2-water exists as vapor in atmosphere  3-vapor cools, condenses and falls back to earth  4-water soaks into ground
    • Ground Water
      • Water held in the pores of rocks
      • Water table – level at which the rock is saturated
      • The water table isn’t constant. It raises or lowers depending on seasonal recharge from rain and also from how much is pumped out.
    • Lakes, Rivers and Streams
      • Lakes hold > 95% of earth’s fresh water
        • Result of glacial action
      • Salt water lakes result from surface changes that cut water off from the sea
    • Dead Sea
    • That’s because the water is so much denser than you that it makes you naturally buoyant. Just don’t get the water in your eyes. It’ll sting.
    • Lakes, Rivers and Streams
      • Rivers and streams flow through channels and move water to or from a larger body of water
        • An area drained by a major river and its tributaries is a drainage basin
      • Continental shelf
        • The point at which the edge of the continent drops off to the deep part of the ocean.
      Oceanic Landforms
    • Continental Landforms
      • Relief – the difference in elevation of a landform from its lowest point to its highest point The bigger the difference, the greater the relief.
      • 4 categories: mountain, hills, plains, and plateaus
      • Topography is the combination and distribution of different landforms in an area
    • Major Landforms
      • Island – a body of land surrounded by water
      • Swamp – a lowland region that is saturated by water
      • Strait – a narrow channel connecting 2 larger bodies of water
      • Delta – a triangular area of land formed from deposits at the mouth of a river
      • Oasis – a spot of fertile land in a desert, fed by water from wells or underground springs
      • Plateau – a broad, flat area of land higher than the surrounding land
      • Prairie – a large, level area of grassland with few or no trees
      • Steppe – a wide, treeless grassy plain
      • Mountain – natural elevation of the earth’s surface with steep sides and greater height than a hill
      • Valley – low land between hills or mountains
      • Glacier – a large ice mass that moves slowly down a mountain or over land
      • Cataract – a step-like series of waterfalls
      • Cliff – the steep, almost vertical edge of a hill, mountain or plain
    • Group Landform Project!!!
      • In your assigned group, work together to create a map of an imaginary continent on your piece of construction paper. This is a physical map only, so your group will not need to include borders or cities.
      • Group One: Landforms on Page 34
      • Group Two: Landforms on Page 35