SNC 2D - Ecology Review
Match words from column B to the most appropriate definition in column A
Column A
Column B
A product of cellular respiration
carnivores
The total mass of all biological material in an ecosystem
food web
This increases population
oxygen
Animals that eat only meat
consumer
Animals that eat only plants
ecosystem
A complex interaction of food chains
herbivores
An organism that eats other organisms
birth rate
Includes both biotic and abiotic factors
carrying capacity
The science of living things and their relation to their environment
ecology
A product of photosynthesis
population
The maximum number of a species that can be sustained in an ecosystem
carbon dioxide
All members of the same species in a particular area
biodiversity
The geographical area in which a species lives
habitat
The number of species living in a specified area
biomass
1.
2.
List
a) 3 things that can cause a population to decline.
b) 4 abiotic factors in an ecosystem.
c) 4 indicators of water quality in an ecosystem.
d) 3 ways humans affect the carbon cycle
e) 2 ways you could increase the population of an endangered species.
3.
In the carbon cycle 2 reactions are primary importance
a) Name the two reactions
b) Write the word equation AND chemical equation for both reactions.
4.
Consider the following.
a)
b) Draw a biomass pyramid that shows an ecosystem in which primary consumers are being over
hunted.
5.
If there are 235 maple trees in two square km of a forested area in Dundas, estimate how many maple
trees there would be in 23 km2 of that forest. What assumption do you make when you make your
estimate.
6.
Larry had a large fenced in property on which he released 23 rabbits one summer.
a) The next year he was asked by a friend how many rabbits were on his property. Describe how Larry
could estimate the rabbit population without catching and caging each rabbit.
b) What factors would limit the growth of that rabbit population?
c) Unfortunately, Larry was unaware that there were holes in his fence. In that first year, 4 rabbits
escaped from Larry's property. Also that year 20 rabbits were born, 6 rabbits died of starvation, 4 were
eaten by hawks, and 2 froze to death in the dead of winter. What was the rabbit population at the end of
the year?
7.
What is an algal bloom? What causes it? What organisms does it affect?
8.
If you were leader of the United Nations, explain how you would solve the population
explosion. Consider human and moral factors in your solution.
9.
a) From which processes does a lake obtain its oxygen content?
b) From which processes does a lake obtain its carbon dioxide content?
10.
Review your diagrams for the carbon cycle and nitrogen cycle.