Science voc. 7th grade
Terms
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- chemosynthesis
- process in which producers make energy-rich nutrient molecules from minerals
- lichens
- type of fungus, usually first organism in primary succession
- succession
- natural, gradual changes in the types of species that live in an area
- elevation
- distance above sea level
- biotic
- features of the environment that are alive or were once alive
- abiotic
- nonliving physical features of tthe environment including air, water, soil, temperature, and climate
- tropic level
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- climate
- average weather conditions of an area overtime including wind, temperature and rainfall
- food web
- model that shows the complex feeding relationships among organisms in a community
- humus
- in soil, formed primarily by decayed remains of plants, animals, and animal droppings
- energy pyramid
- model that shows the amount of energy available at each feeding level in an ecosystem
- soil
- mixture of mineral and rock particles, the remains of dead organisms, & water that forms the top most layer of the Earth's crust & supports plant growth
- climax community
- stable, end stage of ecological succession in which the plants and animals of a community use resources efficiently
- pioneer species
- a group of hardy organisms such as lichens, found in the primary stage of succession and that begin an areas soil building process
- secondary succession
- a succession that begins with bare soil and could be caused by clearing of land, forest fire, or drought
- atmosphere
- air surrounding Earth; made up of gases 78% nitrogen, 21% oxygen, and 0.03% carbon dioxide
- precipitation
- moisture releases from cloud which can come in rain, hail, sleet, or snow
- primary succession
- a succession that starts without soil and could be caused by volcano eruption; where everything turns into rock
- photosynthesis
- producers convert light energy into chemical energy in sugar molecules
- latitude
- an imaginary line of measurement of the earth's surface running parallel to the equator
- rain shadow effect
- the wind blowing toward one side of mountain is forced upward because of the mountains shape; the moisture is released in precipitation & as it goes down other side; it is warm & dry