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WorksheetsEOU 10 Review
Total questions: 20
Worksheet time: 27mins
How is nitrogen "fixed" into a usable form for plants?
Through action of bacteria only
Through lightning only
Through action of bacteria and lightning
Through photosynthesis
How do animals get the nitrogen they need?
From the air they breathe
From the water they drink
From the food they eat
From the sun
What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
nitrogen composition
nitrogen fixation
ammonia
denitrification
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
Plants and animals cannot use nitrogen directly from the air.
True
False
A correct path that nitrogen could take would be
air -> animals -> plants -> bacteria
animals -> air -> bacteria -> plants
bacteria -> air -> plants -> animals
air -> bacteria -> plants -> animals
What do free living bacteria in the soil do?
Make clouds
Turn atmospheric nitrogen into nitrates
Make carbon dioxide for plants to go through photosynthesis
Help plants take in water
Which of the following is a greenhouse gas that is produced during fertilizer production?
CO
CH4
SO2
N2O
Many people apply fertilizer to their lawn in the spring. Chemicals in the fertilizer absorb into the soil and can run off into nearby rivers and streams.
helping grass grow faster
contributing to air pollution
endangering aquatic animals
reducing soil erosion
Which of the following organisms is a primary consumer?
grass
rabbit
fox
snake
What would happen to the rabbit population if the fox population moved out of the area represented by the food web?
The rabbit population would increase
The rabbit population would decrease
The rabbit population would neither increase nor decrease
A chemical pesticide was applied to an area of this ecosystem by a landowner to control the mouse population. There was a decrease in the mouse population due to the presence of this pesticide. Which one of the following would most likely occur due to this change in the ecosystem?
The amount of grass would decrease.
The snake population would increase.
The rabbit food supply would increase.
The snake food supply would increase.
Which of these organisms would most likely be found at the top of an energy pyramid?
clams
sardines
sharks
kelp (seaweed)
The picture shows an energy pyramid. What will most likely happen to the foxes and the wolves if the rabbits are removed?
The foxes will eat more wolves.
The foxes will eat fewer wolves.
There will be more foxes and wolves.
There will be fewer foxes and wolves.
The picture provided shows an ocean bay food chain. Sea otters move into the ocean bay. They eat all of the sea urchins. This change will cause the
kelp to have less food.
crabs to have more food.
sea ducks to have less food.
arctic foxes to have more food.
Suppose that a new predator of the rabbit migrated to this ecosystem. What is the most likely initial effect on the other organisms?
More competition among the mice for food
More competition among the hawks for food
Less competition among snakes for food
Less grass available for food
Which of these organisms would most likely be found at the bottom of a biomass pyramid?
giant squids
sand sharks
sea cucumbers
green algae
The picture shows the energy flow through a meadow community. Which of the following would most likely occur to the populations within the community of organisms immediately after a wildfire burns the environment?
Hawks would increase and foxes would increase.
Hawks would decrease and foxes would increase.
Meadow plants would increase and rabbits would decrease.
Meadow plants would decrease and rabbits would decrease.
