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chapter 2 test review

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Ajai Grewal

on 3 October 2012

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Transcript of chapter 2 test review

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli science chapter test #2 review definitions Herbivore- an animal that only eats plants secondary consumer- an animal that eats meat. bioinvasion- when a huge expansion of species occurs in areas it never existed scavenger- an animal that eats left overs of other dead species energy pyramid-the energy flow within an ecosystem/ food chain. detritivore- an organism that consumes dead organic matter amount of energy left for herbivore consumption- 10% as when corn arrived in Europe hundreds of years ago. example of bioinvasion how energy flows in a pyramid and what can affect that flow- from producers to primary and secondary consumers. extinction can break down the food web what is cycled through an ecosystem- energy to plants from sun, to 1st 2nd 3rd consumer. also things like oxygen, interactions etc. example of competition- tiger herd and coyote herd fighting for prey to eat. sustainability- for an enviroment to continue what it was meant to do. provide air, food , and quality living for life that exists. for an enviroment to sustain itself and keep going. how to reduce ecological footprint- dont pollute earth use less and waste less resources unnatural changes to an ecosystem- global warming nutrient cycle- when decomposers break down dead plants and animals and then are further broken down till there transformed to become nutrients that are available to growing plants composting- is nature's process of recycling decomposed organic materials into a rich soil known as compost describe how a forester tries to make sure the forest industry is sustainable- after cutting down every tree, perhaps he can replant the tree thats been cut down. on dry days provide water to the forest. so theres less risk of wild fires. when cutting down the trees only cut it to its stem instead of taking out from the roots of the tree killing what existed there what would happen if you took out every single worm that existed in your backyard- one thing for sure is that the plants wont grow properly and would most likely die. would make it hard for a bird to find food in your backyard and would no longer break down dead organic material because there no longer there.
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