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
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
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