The Earth as a System Earth’s Spheres.

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Presentation transcript:

The Earth as a System Earth’s Spheres

Earth’s Spheres Atmosphere Hydrosphere Lithosphere Biosphere

Atmosphere Envelopes the Earth A gaseous sphere nitrogen, oxygen, carbon dioxide water vapor.

Hydrosphere All of the water on Earth 71% of the earth is covered by water and only 29% is land!

Lithosphere The Earth's solid surface The Earth’s crust

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

Events A change in one sphere results in changes in others - called an event Forest fire destroys plants in an area

Interactions Interactions between spheres No plants => erosion Soil in water => increased turbidity Turbidity => impacts water plants/animals

Why Do We Need to Understand these Interactions? Helps predict outcomes Preparation for natural disasters Environmental impacts of human activities