3. Classify each of the following as producers, decomposers, herbivore, carnivore, or
omnivore.
a) bacteria
b) spruce tree
c) cougar
d) algae
e) bear
f) owl
g) rabbit
h) caterpillar
4. a) Trophic efficiency is
b) ____%
is lost at each trophic level as energy is transferred.
c) Explain the reason that there cannot be an unlimited number of trophic levels.
5. a) Write the word equation for photosynthesis.
b) Write the word equation for respiration.
6. Identify and explain the following nutrient cycles: water, carbon, nitrogen and
phosphorous.
7. List and explain two processes that humans are responsible for that increases the
amount of carbon dioxide in our atmosphere.
i)
Process
Explanation
i)
Process
Explanation
Page 11 of 18