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FEBRUARY 18, 2015 WARM UP: You need your ISN and textbook
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*Abiotic and Biotic Factors Title and take notes on p.112 in your ISN. Important: You will need to write all information marked with an asterisk *
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Essential Question: How do organisms depend on and compete for biotic and abiotic factors in an ecosystem?
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*Abiotic factors are nonliving parts of the environment * Examples: air, water, soil, rocks, light, and temperature *Organisms depend on many external factors and conditions in order to survive: *Biotic factors are living parts of the environment – * Examples: grasses, trees, animals
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BIOTIC Cows Grass Trees Shrubs ABIOTIC Air Soil, rocks Light Temperature Look at the picture below. What are the biotic and abiotic factors observed?
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* Limiting Factors * Environmental factors that restrict the size of a population. * Organisms COMPETE for these factors. * Examples:food watershelter available sunlight
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Competition in a Food Web Who’s competing for what in this terrestrial food web?
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In this food web, the snake and hawk compete for the mouse. The grasses are competing for sunlight and carbon dioxide.
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* Carrying Capacity: * the largest number of individuals of one species that an environment can support * Disease, space, predators and food are factors that limit carrying capacity * Carrying capacity increases and decreases as the amount of resources changes
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Textbook Assignment Read and work Section 12.1 pp. 486 – 493. Read and work Section 12.1 pp. 486 – 493. Read and work Section 12.2 pp. 498 – 507. Read and work Section 12.2 pp. 498 – 507. Read and work Section 13.2 pp. 546 – 553. Read and work Section 13.2 pp. 546 – 553. Complete the above assignment silently and independently. We will be covering these topics on Thursday and Friday.
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