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The Earth as a
System
Earth’s Spheres
What is a System?
A set of connected items or devices
that operate together
Earth System Science (ESS)
• The study of the interactions
between and among events and
Earth’s spheres
• A relatively new science (1988)
Earth’s Sphere
• Atmosphere
• Hydrosphere
• Lithosphere
• Biosphere
• Cryosphere
Atmosphere
• A gaseous sphere
and it envelopes the
Earth,
• Consists of a mixture
of gases composed
primarily of nitrogen,
oxygen, carbon
dioxide, and water
vapor.
Hydrosphere
• All of the
water on
Earth
• 71% of the
earth is
covered by
water and
only 29% is
terra firma
Lithosphere
• The Earth's solid
surface, often
called the crust of
the earth. It
includes
continental and
oceanic crust as
well as the
various layers of
the Earth's
interior.
Biosphere
• All life on earth,
including man,
and all organisms.
• The life zone on
our planet
distinguishes our
planet from the
others in the solar
system.
Interconnected Spheres
• Spheres are closely connected
• Changes are often chain reactions
• A change in one sphere results in changes in
others - called an event
– Forest fire destroys plants in an area
• Interactions between spheres
– No plants => erosion
– Soil in water => increased turbidity (muddy
water)
– Turbidity => impacts water plants/animals

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Four Spheres of the Earth Presentation.ppt

  • 1. The Earth as a System Earth’s Spheres
  • 2. What is a System? A set of connected items or devices that operate together
  • 3. Earth System Science (ESS) • The study of the interactions between and among events and Earth’s spheres • A relatively new science (1988)
  • 4. Earth’s Sphere • Atmosphere • Hydrosphere • Lithosphere • Biosphere • Cryosphere
  • 5. Atmosphere • A gaseous sphere and it envelopes the Earth, • Consists of a mixture of gases composed primarily of nitrogen, oxygen, carbon dioxide, and water vapor.
  • 6. Hydrosphere • All of the water on Earth • 71% of the earth is covered by water and only 29% is terra firma
  • 7. Lithosphere • The Earth's solid surface, often called the crust of the earth. It includes continental and oceanic crust as well as the various layers of the Earth's interior.
  • 8. Biosphere • All life on earth, including man, and all organisms. • The life zone on our planet distinguishes our planet from the others in the solar system.
  • 9. Interconnected Spheres • Spheres are closely connected • Changes are often chain reactions • A change in one sphere results in changes in others - called an event – Forest fire destroys plants in an area • Interactions between spheres – No plants => erosion – Soil in water => increased turbidity (muddy water) – Turbidity => impacts water plants/animals