1. A View of Earth

2. Earth’s Major Spheres When you look at Earth what stands out the most?
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Earth’s Major Spheres
When you look at Earth what stands out the most?
The worlds oceans cover nearly 71% of Earth's surface
Holds about 97% of Earth's water
Fresh water is found in streams, lakes, glaciers, and underground
Hydrosphere

3. Earth’s Major Spheres Thin, blanket of air
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Earth’s Major Spheres
Atmosphere
Thin, blanket of air
One half of the mass lies below
5.6 kilometers (3.5 miles)

4. Includes all life and the environments they live in
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Earth’s Major Spheres
Biosphere
Includes all life and the environments they live in
Extends from the ocean floor upward for several kilometers into the atmosphere

5. Earth’s Major Spheres Based on Compositional differences:
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Earth’s Major Spheres
Geosphere
Based on Compositional differences:
1. Crust—the thin, rocky outer layer of Earth
2. Mantle—the 2890-kilometer-thick layer of
Earth located below the crust.
3. Core—the innermost layer of Earth, located beneath the mantle.
Based on Structure it consist of:
1. Lithosphere- crust and the upper mantle
ridged
2. Asthenosphere- middle plastic part of the
mantle
3. Outer core- Molten liquid
4. Inner core- solid