 Earth
 Part
is 3rd planet from the sun
of the inner planets because
it is made of rock
 Supports
life because many
organisms depend on water for
survival and it regulates
temperature
 (holds heat)
1.
2.
3.
Temperature regulation
Blocks harmful UV rays
Contains the air we breathe

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Organism: any living thing
Lithosphere: the layer of land that forms
Earth’s surface (made of various rock types)
Hydrosphere: the parts of the Earth that are
made of water
Atmosphere: the layer of gases that
surrounds the Earth
Ecology: the study of interactions among
living and nonliving things
Igneous: liquid rock that has cooled
◦ Example: basalt, granite, obsidian
2. Sedimentary: rocks that have been
compressed over time
◦ Example: stalagmites, limestone,
sandstone, shale
3. Metamorphic: rocks formed by heat
and pressure
◦ Example: marble, slate, schist
1.

Salt water = 97%

Fresh water = 3%
 Most
living things depend on
fresh water for survival
 It
determines how many
organisms can live in one area
 Water
in the artesian well
comes from an aquifer
1.
2.
3.
4.
5.
Igneous Rock: rock that is formed when liquid
rock solidifies and cools
Sedimentary Rock: rock that forms when
layers of sediment compress & cement
together
Metamorphic Rock: rock that have been
transformed by heat & pressure
Aquifer: an underground layer of porous rock
that contains water
Artesian well: a well in which water flows to
the surface due to high pressure underground
 The
air is thinner which means
there is less oxygen to breathe
Nitrogen = 78%
 Oxygen = 21%
 Carbon = .04%

*plants need
carbon dioxide for
photosynthesis in order to produce
oxygen
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1.
2.
3.
4.
Troposphere: touches the Earth,
weather occurs here, water vapor,
most gasses
Stratosphere: contains the ozone
layer
Mesosphere: coldest layer (-100o C)
Thermosphere: hottest layer, very
low air pressure
1.
2.
Troposphere, Stratosphere,
Mesosphere, and Thermosphere
 see your notes!
Ozone: an oxygen gas
containing three oxygen atoms
per molecule
 Biosphere
contains all the land,
water, air, and living organisms.
1.Lithosphere = land
2.Hydrosphere = water
3.Atmosphere = air
1.
2.
3.
Lithosphere: walk, drive, ride
bike
Hydrosphere: drink, swim,
shower
Atmosphere: breathe, travel
(plane)
 Organisms
take what they need
(food, water) from the biosphere
1.
Biosphere: the combined parts of
the lithosphere, hydrosphere,
and atmosphere in which life
exists