WorksheetsFood Chain and Food Webs
Total questions: 15
Worksheet time: 8mins
The following model shows the organisms that Damian saw on a field trip.
Which list only includes organisms within the model that cannot make their own food?
heron, otter, and algae
water lily, algae, and frog
frog, otter, and heron
algae, water lily, and otter
Select the correct set of the following that are consumers.
predators
scavengers
bacteria
scavengers
bacteria
omnivores
omnivores
fungi
producers
predators
scavengers
omnivores
Why are decomposers so important to ecosystems?
They make their own food from sunlight.
They are the main energy source for most producers.
They break down dead organisms into nutrients for producers.
They are the main energy source for most top-level consumers.
Look at the food web.
Which of the following food chains is represented in this food web?
phytoplankton → krill → penguin
krill → leopard seal → cod
cod → squid → zooplankton
elephant seal → penguin → squid
Nathan and Amelia created the food web shown.
Which of the following do Nathan and Amelia need to add to their food web?
producers
decomposers
consumers
predators
Which of the following is a decomposer?
deer
mushroom
rattlesnake
tree
The seaweed in this environment grows on the surface of the ocean. The seaweed survives by manufacturing energy primarily from
salt water.
the Sun.
nutrients in the soil.
small organisms in the sea.
The picture illustrates a food web. Use the web to answer any questions that follow.
consumers that eat plants.
the Sun, which creates light energy.
the soil, which contains many insects.
decomposers that break down other organisms.
Which three things that producers need to make their own food?
air
pollen
water
pollen
water
sunlight
air
water
sunlight
soil
water
sunlight
Producers are organisms that
consume plant and animal remains and other dead matter.
rely on other organisms for their energy and food supply.
use energy from the Sun to make their own food.
obtain their energy by eating only plant material.
Mrs. Gonzalez's seventh-grade class studied food webs after they visited the Miami River. Several students forgot to include bacteria and fungi in their diagrams. Why are bacteria and fungi important in a food web?
Bacteria and fungi break down dead organisms into nutrients.
Bacteria and fungi transform carbon dioxide into oxygen.
Bacteria and fungi create energy from sunlight.
Bacteria and fungi consume living animals.
This image below shows how animals in the Everglades are connected by the flow of energy from the Sun. Which energy consumer belongs in the missing spot in order to complete the food chain?
What is the series of steps in which a large fish eats a small fish that has eaten algae?
food chain
food web
pyramid of numbers
pyramid of biomass
Why would a gardener add earthworms to a garden plot?
The worms eat the unwanted vegetation and excrete wastes, returning nutrients to the soil.
The worms eat the roots of the weeds, so the garden has less weeds competing with his pea plants.
The worms eat pests that damage his crops, so his crop suffers less damage.
The worms secrete chemicals into the soil that make it difficult for weeds to grow.
The picture below shows a pond food chain.
Where does the energy for this food chain enter the system?
Snakes
Soil
Grass
Toads
