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Grade 9 Producers, Consumers & Decomposers Worksheet with Answers
Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Biology
Unit 4: EcologyEcosystemsNGSS HS-LS2-4
Producers, consumers and decomposers, and how energy and nutrients flow through an ecosystem. This free high school worksheet has 16 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comProducers, Consumers & Decomposers
Grade 9 · Biology
Name
Class
Date
Learning goal: Ecosystems · NGSS HS-LS2-4
Directions: This worksheet has 2 parts. Read the instructions at the start of each part.
What do we call an organism that makes its own food, like a plant?
Answer: a producer
Label the diagram. Use the words in the box.
Word bank
- 1
- 2
- 3
- 4
Answer each question. Use full sentences where you can.
- 5
What is a secondary consumer?
- 6
What do we call an organism that breaks down dead material for nutrients?
- 7
What is a primary consumer?
- 8
What do we call an animal that feeds on dead animals, like a vulture?
- 9
What do we call an animal that eats only plants?
- 10
Where does the energy in almost every food chain originally come from?
- 11
What does an energy pyramid show?
- 12
What do we call each level in a food chain?
- 13
What would happen to an ecosystem without decomposers?
- 14
Why are there usually fewer top predators than herbivores in an ecosystem?
- 15
What do we call a diagram showing many connected food chains in one ecosystem?
- 16
What do we call an animal that eats only meat?
★ Challenge corner for fast finishers
If you could fold a sheet of paper 42 times, roughly how thick would it be?
How did I do?
Teacher's comments
Free printable worksheets with answer keys · aethelsystems.com/worksheets/biology/9/ecosystem_roles
Answer key — Producers, Consumers & Decomposers (Grade 9)
- 1.producer
- 2.primary consumer
- 3.secondary consumer
- 4.decomposer
- 5.an animal that eats primary consumers
- 6.a decomposer
- 7.an animal that eats producers (a herbivore)
- 8.a scavenger
- 9.an herbivore
- 10.the sun
- 11.how much energy is available at each level of a food chain
- 12.a trophic level
- 13.dead material would pile up and nutrients would not return to the soil
- 14.energy is lost at each level, so less is available to support animals higher up
- 15.a food web
- 16.a carnivore
- ★far enough to reach the Moon (about 440,000 km)
Answer key (click to show)
- 1.producer
- 2.primary consumer
- 3.secondary consumer
- 4.decomposer
- 5.an animal that eats primary consumers
- 6.a decomposer
- 7.an animal that eats producers (a herbivore)
- 8.a scavenger
- 9.an herbivore
- 10.the sun
- 11.how much energy is available at each level of a food chain
- 12.a trophic level
- 13.dead material would pile up and nutrients would not return to the soil
- 14.energy is lost at each level, so less is available to support animals higher up
- 15.a food web
- 16.a carnivore
- ★far enough to reach the Moon (about 440,000 km) (challenge corner)
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