Worksheet: Food Webs

In this worksheet, we will practice interpreting the interdependent relationships of organisms in ecosystems using food webs.

Q1:

Each link of the food chain is named according to what the organism eats and how it contributes to the energy of the ecosystem.

Fill in the blank: Plants are . They produce energy for the ecosystem through the process known as photosynthesis.

  • Aproducers
  • Bdecomposers
  • Cconsumers

Q2:

Fill in the blank: Animals are . They do not produce energy; they use it.

  • Adecomposers
  • Bconsumers
  • Cproducers

Q3:

Look carefully at the food web shown. Plants are called producers as they produce the food which starts all food chains.

Where do all living things get their energy from?

  • AThe Sun
  • BPlants
  • CInsects
  • DBirds

Q4:

What is the source of all energy in a food chain?

  • AThe producer
  • BThe consumer
  • CThe predator
  • DThe sun

Q5:

Fill in the blank: Animals that eat plants are called primary consumers. These animals can also be classified as .

Zebra-72 ppi
  • Adecomposers
  • Bherbivores
  • Ccarnivores

Q6:

Name the primary consumer in this food web.

  • AThe eagle
  • BThe grasshopper
  • CThe frog
  • DThe python

Q7:

Name the producer in this food web.

  • AThe mouse
  • BThe snake
  • CThe eagle
  • DThe plant

Q8:

Fungi do not produce their own food. They consume dead plants and animals.

How would they be classified in an ecosystem?

Mushroom grows on old tree
  • AConsumers
  • BDecomposers
  • CProducers

Q9:

Worms are decomposers. What role do decomposers play in ecosystems?

  • ADecomposers produce food using energy from the Sun.
  • BDecomposers consume living animals.
  • CDecomposers help put nutrients back into the soil.

Q10:

Fill in the blank: Animals that eat other animals are called secondary consumers or .

Cheetahs and the tail muscles-72 ppi
  • Aherbivores
  • Bdecomposers
  • Ccarnivores

Q11:

Organisms in an ecosystem depend on each other for survival. Diagrams called food webs (or chains) are used to show these dependent relationships.

How do food chains begin?

  • AWith an animal
  • BWith a plant

Q12:

Name the two producers in the food web shown.

  • AZooplankton and phytoplankton
  • BFish and crab
  • CPhytoplankton and seaweed
  • DBlue whale and leopard seal

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