The document summarizes key components of the Earth system including the atmosphere, hydrosphere, cryosphere, biosphere, and lithosphere. It provides details on: 1) The composition and role of the atmosphere in redistributing heat and exchanging moisture with the hydrosphere. 2) The hydrosphere, including that 70% of Earth is covered in ocean water, freshwater accounts for only 3% mostly as ice or groundwater, and the oceans absorb heat and CO2. 3) The cryosphere includes polar ice caps, glaciers, and permafrost and interacts with the hydrosphere influencing sea levels, currents and climates.

1. E a r t h
S u b s y s t e m s
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by: juliet marabise-opanes

2. p r e - c l a s s a c t i v i t y
A.Label the different
processes and phases of
water involved in the water
cycle.
B.Used the following terms
to complete the cycle.
i.Condensation
ii.Precipitation
iii.Evaporation
iv.Transpiration
v.Infiltration
vi.Surface run-off

3. THEEARTHSYSTEM EARTH system
is essentially as
closed system. It
receives energy
from the sun and
returns some of
this energy to
space.

4. A. The atmosphere is the thin gaseous layer that envelopes
the lithosphere.
B. The present atmosphere is composed of 78% nitrogen (N),
21% oxygen (O2), 0.9% argon, and trace amount of other gasses.
C. One of the most important processes by which the heat
on the Earth’s Surface is redistributed is through atmospheric
circulation.
D. There is also a constant exchange of heat and moisture
between the atmosphere and the hydrosphere through the
hydrologic cycle.
ATMOSPHERE (Air): The layer of gases surrounding the
Earth, including the troposphere (where weather occurs),
stratosphere (containing the ozone layer), and other
atmospheric layers. It influences weather patterns,
climate, and supports life through oxygen and other
gases.

12. The plants that once
existed on earth
eventually die and then
decompose into the soil.
The decomposed matter
passes into the
lithosphere from the
biosphere. As time passes,
they become a part of the
lithosphere as fossil
fuels.

18. H Y D R O S P H E R E
All the water on Earth,
including oceans,
lakes, rivers, and
groundwater. The
hydrosphere interacts
with the atmosphere
through the water
cycle, and it's vital
for supporting life and
regulating climate.

19. H Y D R O S P H E R E
A. About 70% of the earth
is covered with liquid water
(hydrosphere) and much of it
is in the form of ocean
water.
B. Only 3% of earth water
is fresh:2/3 are in the Form
of ice, and the remaining 1/3
is present in streams, lakes
and ground water.

20. H Y D R O S P H E R E
C. The oceans are
important sinks for CO2
through direct exchange with
atmosphere and indirect
through the weathering of
rocks.
D. Heat is absorbed is
distributed on the surface of
the earth through ocean
circulation.

21. C r y o s p h e r e
(Ice and Frozen Water):
This subsystem includes
polar ice caps,
glaciers, and
permafrost. It
interacts with the
hydrosphere and
influences sea levels,
ocean currents, and
regional climates.

24. A r e t h e r e a n y
q u e s t i o n s ?