ch.5.less.1.how can we describe earth's features(2)
TRANSCRIPT
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How can we describe earth’s
features?Continued
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Features of the ocean floor
Continental shelf
Continental shelf
Is the ocean floor along a continent’s coast.
(The ocean floor is covered by shallow water that slowly slopes down)
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Continental Slope
The sharp slope at which the continental shelf ends
Continental Slope
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Continental rise
Is the gentle slope after the continental slope
Continental rise
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Abyssal plain
Abyssal plainA wide flat area on the ocean
floor(Found near mouths of large
rivers)
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Submarine canyon
Is a steep side valley in a continental slope.
(Found near mouths of large rivers)
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TrenchesDeepest part of the ocean floor
(Usually long and narrow)
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Sea mountAn underwater mountain that rises from the ocean floor but
stops before it reaches the surface of the water.
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Mid ocean ridges
Underwater mountain ranges.
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Rift valley The valley down the center of a mid ocean ridge.
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Scientists can tell the depth of the ocean floor by sending sounds into the ocean and
waiting for the echo to come back.
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Underwater vehicle(To explore ocean floor)
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Layers of the earth
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Atmosphere
Hydrosphere
In latin:‘Sphere’ means
ball‘Atmos’ means
gas.So,
Atmosphere is a ball of gas.
In latin:‘Sphere’ means
ball‘Hydro’ means
water.So,
Hydrosphere is a ball of water.
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Hydrosphere
Atmosphere
Upper mantle
Crust
Lower mantle
Outer core
Outer core
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Crust- The rocky layer of
earth’s surface.- The crust
includes continents and ocean basins.
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Upper mantle
The Mantle is made of layers.(The mantle makes up most of the earth’s mass)
- The top of the upper mantle is solid rock.
- Top of upper mantle + crust = LITHOSPHERE
- The rest of the upper mantle is made of melted rock (ASTHENOSPHERE).
Lower mantle- The Lower mantle is
made of solid rock.
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Outer core
The Core is the center of the earth.
(The core is divided into outer and inner core)
- The outer core is made of Liquid (melted) metals.
Inner core- The inner core is made
of solid metals.
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Biosphere.(Includes parts of the earth where living things are
found)
What layers of the earth makes up the earth’s
biosphere?
The atmosphere, hydrosphere and crust