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WorksheetsFood Webs and Chains
Total questions: 36
Worksheet time: 18mins
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 shows an ocean bay food chain. Sea otters move into the ocean bay. They eat all 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
Which model correctly shows energy flow in a food chain?
A marine food web is shown. Which organism below belongs in level 3 of this marine food web?
salmon
zooplankton
sea algae
polar bear
A marine food web is shown. Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?
This 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 statement best describes what will happen if the population of herbivores in the community decreases?
The population of foxes will increase.
The population of hawks will increase.
The population of rabbits will increase.
The population of meadow plants will increase.
Which statement best describes the flow of energy as it passes through the organisms in the pyramid?
Energy flows through the organisms from bottom to top and increases at each level.
Energy flows through the organisms from bottom to top and decreases at each level.
Energy flows through the organisms from top to bottom and increases at each level.
Energy flows through the organisms from top to bottom and decreases at each level.
The diagram shows a simple food web. Which animal is classified as an omnivore?
red fox
deer
black bear
rabbit
The diagram shows a simple food web. Which of the following animals might compete with the coyote in this food chain?
Decomposers are important in the food chain because they
produce their own food using light from the sun
stop the flow of energy from one organism to another
break down dead organisms and recycle nutrients into the soil
are microscopic and other organisms cannot consume them
This diagram shows a marine food chain. The zooplankton in this food chain are
primary producers
primary consumers
secondary consumers
tertiary consumers
The table above contains information about animal diets. Which energy pyramid best represents the data in the table?
A forest ecosystem food web is shown. If additional wrens are introduced into this ecosystem, there will most likely be an immediate decrease in the
frog population
snake population
falcon population
grasshopper population
In a pond, the primary producer is a green alga, Spirogyra; the primary consumer is the crustacean, Daphnia. The secondary consumer is a small fish, the bluegill; and the tertiary consumer is a larger fish, the smallmouth bass. What changes can be expected in the pond if the Daphnia are killed with pesticides?
The Spirogyra population will probably die.
The bluegill population will probably increase.
The Daphnia population will eat something else.
The smallmouth bass population will die.
For the food chain shown, which of the following changes would have the most severe consequences?
a drastic decrease in rainfall, causing 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
Which of these organisms would most likely be found at the top of an energy pyramid?
clams
sardines
sharks
kelp
Which of these organisms would most likely be found at the bottom of a biomass pyramid?
giant squids
sand sharks
sea cucumbers
green algae
As organisms eat other organisms, energy and nutrients pass through various feeding levels. These feeding levels are called trophic levels. The following is a diagram of the energy and nutrient flow through a simple community. Which group would most likely contain living algae?
Producers
First order consumers
Second order consumers
Decomposers
According to the diagram, nutrients from dead organisms are released into the soil by the action of _______.
producers
first order consumers
second order consumers
decomposers
A group of students on a field trip observed the following organisms on an old oak tree: woodpecker, honeybee, oak, squirrel, beetle, and caterpillar. Which of the following food chains is most likely to be found in this ecosystem?
caterpillar --> honeybee --> woodpecker
oak tree --> squirrel --> woodpecker
oak tree --> caterpillar --> woodpecker
beetle --> woodpecker --> squirrel
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 into 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 the snakes for food
less grass available for food
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 first 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 available chemical energy in this ecosystem _____.
decreases as it flows from consumer to producer
remains constant as it flows from consumer to producer
decreases as it flows from producer to consumer
increases as it flows from producer to consumer
If animals eat plants to get energy, where do plants get their energy?
soil
water
wind
sun
A simple food chain is shown. What is the source of food in this food chain?
sun
grass
frog
grasshopper
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 will increase.
A student examines the information in the table. The student concludes that Organism W should be placed at the base of the food web. However, the student later learns that Organism W's cells do not contain chloroplasts. Which conclusion would be appropriate, based on the new information?
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.
Wolves get energy from eating rabbits. Rabbits get energy from eating grass. The grass makes its own food energy. If lots of the wolves were killed, then
there would be more rabbits
there would be fewer rabbits
more grass would grow
less grass would be eaten
In ecosystems, the sun's energy is transferred through food webs as shown. The sun's energy is most directly available to people through
path A
path B
path C
path D
We get energy from the food we eat. The energy in the food first comes from the
soil
fertilizers used by farmers
sun
vitamins added by food manufacturers
In this energy pyramid, which organism would most likely be in level 2?
bird
fox
caterpillar
tree
Which group of organisms is not represented in the diagram above of a simple food web?
decomposers
consumers
prey
producers
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.
Which group is not represented in the food web?
producers
primary consumers
secondary consumers
decomposers
