Download Sustaining Ecosystems Unit Review

SNC 1D
Ecosystems Unit Review
Name: _______________________
1. Write a brief definition for each of the terms below:
Term
Definition
Term
Biotic
Producer
Abiotic
Consumer
detritivore
Herbivore
habitat
omnivore
biodiversity
carnivore
Invasive
species
biosphere
Definition
2. Label the following organisms as producers (P), consumers (C), or decomposers (D). If it is a consumer, label
it as a herbivore (H), carnivore (Ca) or omnivore (O)
a. Algae
________________________
b. Frogs
________________________
c. Bacteria
________________________
d. Pine tree
________________________
e. Humans
________________________
3. Match column A with the appropriate definition in column B
Column A
Column B
Biosphere
- solid portion of the Earth composed of rocks and minerals
Lithosphere
- includes the gases that rise over the surface of the Earth
Hydrosphere
- made up of all the living things on Earth
Atmosphere
- represents all the water on Earth
4. Complete the chart.
Biotic Factors
Abiotic Factors
Tundra
Boreal Forest
(Taiga)
Grassland
Temp. Deciduous
Forest
5. Describe photosynthesis. Any variables marked with a (?), put a yes/no in the column.
Comparison
Photosynthesis
Raw materials needed
Products
Occurs in plants (?)
Occurs in animals (?)
Light is required (?)
Energy Is released (?)
Energy is needed (?)
Complete the word equation for photosynthesis:
Carbon dioxide + ___________ +______________ -------- __________________ + oxygen
6. a. What is an invasive species?
b. How do invasive species get into new ecosystems?
c. Why are invasive species damaging to the new local system?
7
a.
What is the purpose of using pesticides?
b.
Why should their use be monitored?
8. If a toxin such as DDT were used to control mosquitoes in an ecosystem, which organism would end up with
the highest concentration of the insecticide in its body? Explain.
9. Human interference often causes ecosystems to change. Provide an example of how human interference has
caused:
a. An increase in the population of a species
b. A decrease in the population of a species
c. An increase to the amount of carbon that enters the atmosphere
10. True or False. Circle the correct answer
T
F
Decomposers are autotrophs
T
F
Topsoil is thicker layer than subsoil
T
F
A maple tree branch could be a niche for an owl
T
F
Scavengers are consumers
T
F
A top carnivore is not prey for other predators
T
F
If a field mouse eats grasshoppers it is at the first trophic level
T
F
Ammonia is a usable form of nitrogen
T
F
Carrying capacity is the maximum number of organisms of a population that the
environment can support
T
F
There is a loss of approximately 50% of energy at each trophic level
11. For the following food chain, identify the required components.
Buttercups - caterpillar - sparrow - cat - fox
a. herbivore
__________________________
b. top carnivore
__________________________
c. primary consumer
__________________________
d. organism at 3rd trophic level
__________________________
12 a. List 2 ways that atmospheric nitrogen can be converted into a nitrogen compound.
b. What organism is most responsible for the recycling of nitrogen in the nitrogen cycle?
13. Trace the path of a molecule of water from raindrop back into the atmosphere including cycling through a
human body.
14. The carrying capacity of a population is defined as:
a. The maximum number of individuals that can be supported indefinitely in an ecosystem
b. The maximum number of offspring a species could produce if resources are unlimited
c. The nutrient that is in the least supply and limits the population size
d. The limited range of abiotic factors range within which an organism can survive.
15. If you were to dig a hole in the ground, what are the different layers of soil? Describe each one.
16. Review how to draw a population graph and label and interpret carrying capacity.
17. Natural eutrophication takes _________________ to occur. Artificial eutrofication takes _________________
to occur.
18. In eutrophication, the decomposing of dead algae uses up all of the ________________ in the water causing
the animals (fish) to die.
19. The nutrients involved in eutrophication are _________________ and ________________.