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WorksheetsFood Webs
Total questions: 18
Worksheet time: 36mins
Which group is not represented in the food web?
producers
primary consumers
secondary consumers
decomposers
What do the arrows in the food chain indicate about the flow of energy in an ecosystem?
Energy is continuously recycled by the organisms in an ecosystem.
Energy flows in one direction in an ecosystem, from producers to consumers.
More of the available energy in an ecosystem is given to large animals than to small animals.
Organisms at the end of the food chain receive more energy than those at the beginning.
In this energy pyramid, which organism would most likely be in level 2?
bird
fox
caterpillar
tree
Which one of the following is true of grass in an ecosystem?
It converts oxygen to glucose.
It produces carbon dioxide from oxygen and water.
It produces glucose from carbon dioxide and water.
It converts water to energy.
How would the removal of earthworms from the food chain affect the other organisms?
The number of bass will increase.
The number of crayfish will decrease.
The crayfish will get their energy directly from the sun.
The number of bass and ospreys (bird) will increase.
Interactions in an ecosystem result from the transfer of matter and energy from producers to consumers and eventually decomposers. What are the forms of energy transfer from numbers 1 through 4?
Chemical energy to chemical energy
Light energy to chemical energy
Chemical energy to heat energy
Heat energy to mechanical energy
The diagram shows part of an aquatic food web for a stable lake ecosystem in Connecticut. What is the source of energy for the algae?
waves
sunlight
bacteria
rotifers, water fleas and tadpoles
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
For the food chain shown, which of the following changes would have the most severe consequences?
a drastic decrease in rainfall, causing a drought
the poaching of predatory hawks by game hunters
the introduction of a second predator that eats field mice
a parasitic infestation that reduces the cricket population
The diagram provided shows a marine food chain. In this food chain, the zooplankton are
primary producers.
primary consumers.
secondary consumers.
tertiary consumers.
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.
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 diagram provided shows a simple food web. Which group of organisms is not represented in the diagram?
prey
decomposers
consumers
producers
A student examines the information in the table. The student concludes that Organism W should be placed at the base of the food web to represent the feeding relationships in the marine ecosystem. However, the student later learns that Organism W's cells do not contain chloroplasts. Based on the new information, which conclusion would be appropriate?
Another organism in the marine ecosystem is a producer.
Organism W is a secondary consumer in the marine ecosystem.
The role of Organism T in the marine ecosystem changes during its life.
This marine ecosystem does not have any producers.
Which of these organisms would most likely be found at the top of an energy pyramid?
clams
sardines
sharks
kelp (seaweed)
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.
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.
Which of these organisms would most likely be found at the bottom of a biomass pyramid?
giant squids
sand sharks
sea cucumbers
green algae
