ch03_0495556718_164041

ch03_0495556718_164041 - microorganisms break down some of...

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Chapter 3 Ecosystems: What Are They and How Do They Work Summary 1. Ecology is the study of connections in nature. 2. Life on earth is sustained by the one-way flow of high-quality energy from the sun, by the cycling of matter, and by gravity. 3. Matter, energy, and life are the major components of an ecosystem. 4. Energy in an ecosystem decreases in amount to each succeeding organism in a food chair or web. 5. Soil is a complex mixture of eroded rock, mineral nutrients, water, air, decaying organic matter, and billions of living organisms. It covers most of the earth and provides nutrients for plant growth. Soils are formed by a breaking down of rock, decomposing surface litter and organic matter. Bacteria and other decomposer
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Unformatted text preview: microorganisms break down some of soils organic compounds into simpler inorganic compounds. 6. Matter is recycled through the earths ecosystem of air, land, water, and living organisms. This vast global recycling system is composed of nutrient cycles. 7. Scientists study ecosystems through the use of aquarium tanks, greenhouses, and controlled indoor and outdoor chambers. Specific variables are carefully controlled, like temperature, light, carbon dioxide, and humidity. 8. Two principles of sustainability found from learning how nature works are the law of conservation of matter and the two laws of thermodynamics....
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This note was uploaded on 07/26/2009 for the course BIO 1100 taught by Professor Na during the Spring '09 term at Concordia AB.

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