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Transcript
Sphere of Earth: A layer
that surrounds the Earth
 Atmosphere: Shell of gases that surrounds a
planet, for example, Earth
a. Earth’s atmosphere is unique because it
contains oxygen
b. Atmosphere = Air
 Lithosphere(also known as Geosphere): Solid
portion of Earth below the atmosphere and the
hydrosphere
a. Includes: rocks, mountains and beaches
 Hydrosphere: Earth’s liquid water
a. Includes: oceans, lakes, streams and
groundwater
 Biosphere: The portion of Earth that supports
life, from far down in the ocean to high up in the
sky
a. Plants and animals are part of the biosphere
 Earth is the only known planet currently
supporting life due to the interactions among its
four spheres.
 The four spheres of the Earth system are
constantly moving and changing