(par 3. 3 ) Cycles of Nature
http://www.uen.org/themepark/cycles/nature.shtml Nature’s cycles have to do with how the earth renews itself. The living things within an ecosystem interact with each other and also with their non-living environment to form an ecological unit that is largely self-contained. Sometimes this renewal process is gradual and gentle. Sometimes it is violent and destructive. Nevertheless, ecosystems contain within […]
(par 3. 2.2) Food Chains and Food Webs
Food Chains and Food Webs “What’s for dinner?” http://www.enchantedlearning.com/subjects/foodchain/ Every organism needs to obtain energy in order to live. For example, plants get energy from the sun, some animals eat plants, and some animals eat other animals. A food chain is the sequence of who eats whom in a biological community (an ecosystem) to obtain […]
(par 3. 2.2) Food Chain and Food Web
http://www.ducksters.com/science/ecosystems/food_chain_and_web.php Every living plant and animal must have energy to survive. Plants rely on the soil, water, and the sun for energy. Animals rely on plants as well as other animals for energy. In an ecosystem, plants and animals all rely on each other to live. Scientists sometimes describe this dependence using a food chain or […]