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Respiration and Ecology
Respiration:
 Respiration is the process of releasing energy from
food
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 Food energy is measured in kilojoules (Kj) or
kilocalories (Kcal)
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 When food burns – it releases energy in the form of
heat
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 This chemical reaction is called respiration
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 Respiration needs oxygen to burn the food to
release energy
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How food Is turned into energy:
 We get the oxygen by breathing in
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Word equation for respiration:
Glucose + oxygen = energy + carbon + water
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1
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Example: wind
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Chemical environment – substances and how
they react with one another
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 Organisms are living things
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 There are 4 levels in ecology:
1
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Community: 2 or more populations of different
species living together in an area
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Ecosystem: the community and its habitat
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Biosphere: all earths’ ecosystems combined
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 Biotic factors
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Abiotic components/factors:
 Non-living things in an ecosystem
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Biotic and abiotic factors interact together as a system
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How each individual living organisms survive in a habitat
will depends on its ability to adapt with changes in the
ecosystem
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There are 2 sampling methods:
 Quadrant sampling
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