Ch.5.less.1.how can we describe earth's features(2)
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Transcript of Ch.5.less.1.how can we describe earth's features(2)
How can we describe earth’s
features?Continued
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)
Continental Slope
The sharp slope at which the continental shelf ends
Continental Slope
Continental rise
Is the gentle slope after the continental slope
Continental rise
Abyssal plain
Abyssal plainA wide flat area on the ocean
floor(Found near mouths of large
rivers)
Submarine canyon
Is a steep side valley in a continental slope.
(Found near mouths of large rivers)
TrenchesDeepest part of the ocean floor
(Usually long and narrow)
Sea mountAn underwater mountain that rises from the ocean floor but
stops before it reaches the surface of the water.
Mid ocean ridges
Underwater mountain ranges.
Rift valley The valley down the center of a mid ocean ridge.
Scientists can tell the depth of the ocean floor by sending sounds into the ocean and
waiting for the echo to come back.
Underwater vehicle(To explore ocean floor)
Layers of the earth
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.
Hydrosphere
Atmosphere
Upper mantle
Crust
Lower mantle
Outer core
Outer core
Crust- The rocky layer of
earth’s surface.- The crust
includes continents and ocean basins.
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.
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.
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