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Transcript
The Earth’s Physical Systems Atmosphere, Hydrosphere, Lithosphere, and Biosphere Earth System (4 physical systems) Atmosphere Layer of gases that surround Earth. Allows you to breathe and protects earth. Lithosphere (crust and MOHO) Surface of the planet that forms the continents and the ocean floor. Earth System (4 physical systems) Hydrosphere All the water on Earth (ocean, ice, and water vapor in the atmosphere) Biosphere Part of Earth where life exists. Lithosphere METEOROLOGY Biosphere GEOLOGY Atmosphere Hydrosphere ASTRONOMY OCEANOGRAPHY Human Actions Affecting the Atmosphere NEGATIVE Ozone Depletion UV rays can destroy a type of bacteria known as Cyanobacteria which produces much of Earth's oxygen. Exposure to harmful UV rays can cause skin cancer and cataracts. An excess level of UV rays could lead to the death of the phytoplanktons, that are an important component of the food web of the oceans. Global warming Glacier melting which leads to flooding Changing weather POSITIVE Clean Air Act Human Actions Affecting the Lithosphere NEGATIVE Over Harvesting •imbalance in the food chain the death of a species Air and Water Pollution • Weathering • Loss of useful water POSITIVE Reforestation Restocking of fish Water purification Human Actions Affecting the Hydrosphere NEGATIVE Pesticides washing into river systems Decline of quality groundwater Acid Rain Damages trees at high elevations decay of building materials and paints, including irreplaceable buildings, statues, and sculptures harmful to public health POSITIVE Release of oceanic carbon dioxide Human Actions Affecting the Biosphere NEGATIVE Deforestation flooding landslides and mudslides trees are an important part of the water cycle forests home to a large number of animals Strip Mining water pollution landslides fires hazards to public health & safety POSITIVE Prevention of forest fires by proper forest management