Page 83 - Science Course 2 (Book 2)

Mo10-L2a: What is the Carbon Cycle?

The hydrosphere contains all of Earth’s water. The largest Earth system is the geosphere, which
includes the thin layer of soil and rocks on Earth’s
Most of the water in the hydrosphere is on the surface and all the underlying layers of Earth.
Earth’s surface—in oceans, glaciers, lakes, ice
sheets, ponds, and rivers. Because the geosphere is mainly solid, materials in
this system tend to move slowly.
Water in the hydrosphere continuously moves from
place to place.

All living things on Earth make up the biosphere.

Because organisms live in air, water, soil, and rocks, the biosphere
is within all other Earth systems.

Biosphere Geosphere Hydrosphere
• The ozone layer helps • Wind causes weathering • The water cycle inf uences
protect organism from and erosion. weather and climate
harmful solar radiation.
Atmosphere • Volcanic eruptions eject • Increasing global tempera
• Plants use carbon dioxide gas and debris into the air. tureslead to melting polar
during photosynthesis. ice caps

• All organisms need water • Water and ice causes
for life functions. weathering, erosion, and
deposition.
Hydrosphere
• Rising sea levels change
habitats. • Hurricanes and tsunamis
change coastal landforms.
• Materials in the geosphere
provide nutrients for life
functions.
Geosphere
• Organisms contribute to
weathering, erosion and
fossil fuel formation.
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