3. Classify each of the following as producers, decomposers, herbivore, carnivore, or
omnivore.
a) bacteria D
b) spruce tree P
c) cougar C
d) algae P
e) bear O
f) owl C
g) rabbit H
h) caterpillar H
4. a) Trophic efficiency is the amount of energy passed up the food chain.
b) 90% is lost at each trophic level as energy is transferred.
c) Explain the reason that there cannot be an unlimited number of trophic levels.
~ see trophic efficiency
5. a) Write the word equation for photosynthesis.
Carbon Dioxide + Water -> Sugar + Oxygen
b) Write the word equation for respiration.
Sugar + Oxygen -> Carbon dioxide + Water
6. Identify and explain the following nutrient cycles: water, carbon, nitrogen and
phosphorous. See Textbook
7. List and explain two processes that humans are responsible for that increases the
amount of carbon dioxide in our atmosphere.
i)
Process
Explanation
Combustion
Car exhaust from the engine
i)
Process
Explanation
Electricity production
Coal fired power generators
8. Two greenhouse gases are Carbon Dioxide and Water Vapour
9. a) A niche is an organisms occupation
b) An example of the niche of a big brown bat is
i. Hunt at night
ii. Eat small insects
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