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Section 2.4 and 2.5 Energy in Ecosystems
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Key Terms Radiant energy – comes from the sun
Thermal energy – energy transferred during heating and cooling
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Photosynthesis The process in which the Sun’s energy is converted into chemical energy Carbon dioxide + water sugar + oxygen
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Food Chains & Webs Producer (first trophic level) – an organism that can make its own food. Primary consumers (second trophic level) – herbivores Secondary consumers (third trophic level) – omnivores/small carnivores Tertiary consumers (fourth trophic level) – larger carnivores Scavengers (any level) – feeds on the remains of other organisms
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Ecological Niches The function a species serves in an ecosystem, including what is eats and how it behaves.
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Ecological Pyramids Show the relationships between the trophic levels in ecosystems (the amount of energy, numbers or biomass)
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Today’s Tasks Weaving a food web activity Pg. 45 #1-5
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