Physical Geography.

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Presentation transcript:

Physical Geography

How do physical process affect: planetary ecosystem consisting of the atmosphere, the geosphere (lithosphere), the hydrosphere, and the biosphere ECOSPHERE

LITHOSPHERE Solid, rocky crust covering entire planet. Three main layers the core, or the inner layer the mantle, in the middle the crust. 100 kilometers (60 miles) deep in most places, includes the brittle upper portion of the mantle and the crust. It is broken into huge sections called tectonic plates. The movement of the lithosphere, called plate tectonics, is the reason behind a lot of Earth's most dramatic geologic events. always moving, but very slowly. http://mediatheek.thinkquest.nl/~ll125/images/struct.jpg

The air surrounding Earth ATMOSPHERE The air surrounding Earth 78% Nitrogen Just under 21% Oxygen less than 1% argon, carbon dioxide & other gasses Water vapor and dust are also part of Earth’s atmosphere. acts as a gigantic filter, keeping out most ultraviolet radiation while letting in the sun’s warming rays. www.space.gc.ca

All the water in or near the Earth HYDROSPHERE All the water in or near the Earth The hydrosphere can be liquid, vapor, or ice. exists on the surface in oceans, lakes and rivers. exists below ground—as groundwater, in wells and aquifers. Water vapor is most visible as clouds and fog.

BIOSPHERE Composed of all living organisms Plants Animals One-celled organisms Made up of the parts of Earth where life exists. Since life exists on the ground, in the air, and in the water, the biosphere overlaps all of Earth’s spheres. Measures about 20 kilometers (12 miles) from top to bottom Almost all life exists between about 500 meters (1,640 feet) below the ocean’s surface to about 6 kilometers (3.75 miles) above sea level.

5 Oceans – Southern, Arctic, Pacific, Indian, Atlantic 7 continents – Africa, Asia, Antarctica, South America, North America, Europe & Australia 5 Oceans – Southern, Arctic, Pacific, Indian, Atlantic