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Grade 6 Science · Food Webs and Energy Flow

Grade 6 Food Webs and Energy Flow Practice Test

Build Grade 6 Science skills with five 10-question practice tests on food chains, food webs, trophic levels, energy pyramids, producers, consumers, decomposers, and energy transfer.

Food Webs and Energy Flow Practice Tests

These Grade 6 Science practice tests help students model how energy moves through ecosystems. Students practice reading food chains and food webs, identifying producers and consumers, comparing trophic levels, interpreting energy pyramids, explaining decomposer roles, and predicting how population changes affect connected organisms.

Skills covered

  • Reading arrows and relationships in food chains and food webs
  • Identifying producers, primary consumers, secondary consumers, and decomposers
  • Comparing trophic levels and energy pyramids
  • Explaining why energy decreases as it moves through a food web
  • Distinguishing energy flow from matter cycling
  • Using evidence to predict effects of population and environmental changes

How to use these practice tests

Start at the producer and follow each arrow toward the organism that receives energy. Identify the trophic level of each organism, then consider how limited energy and resources affect the number of organisms at higher levels. Remember that energy flows through an ecosystem while materials are recycled by decomposers.

For more Grade 6 Science practice, return to the Grade 6 Science category.

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Grade 6 Food Webs and Energy Flow Practice Tests

A 10-question Grade 6 Science practice test on food chains, food webs, trophic levels, energy pyramids, producers, consumers, decomposers, and energy transfer.

Trace energy through food chains and webs, identify trophic levels, compare energy and matter movement, and use evidence to explain ecosystem changes.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is a trophic level?

Please select an answer first.

Correct answer: A

The correct answer is A feeding position in a food chain or food web.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Trophic levels show where organisms obtain energy within feeding relationships.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Trophic levels show where organisms obtain energy within feeding relationships.

2. QuestionMultiple choice

Which organism is at the highest trophic level in this chain: grass, rabbit, fox?

Please select an answer first.

Correct answer: B

The correct answer is The fox.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: The fox eats the rabbit, which eats grass, so the fox is at the highest level in this chain.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

The fox eats the rabbit, which eats grass, so the fox is at the highest level in this chain.

3. QuestionMultiple choice

Why is less energy available at higher trophic levels?

Please select an answer first.

Correct answer: C

The correct answer is Organisms use much of the energy they obtain for life processes..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Energy is used for movement, growth, repair, and other processes, so less is passed to the next level.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Energy is used for movement, growth, repair, and other processes, so less is passed to the next level.

4. QuestionMultiple choice

What does an energy pyramid show?

Please select an answer first.

Correct answer: D

The correct answer is The relative amount of available energy at each trophic level.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: An energy pyramid represents how available energy generally decreases at higher trophic levels.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

An energy pyramid represents how available energy generally decreases at higher trophic levels.

5. QuestionMultiple choice

Which level usually contains the greatest amount of energy?

Please select an answer first.

Correct answer: A

The correct answer is The producer level.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Producers receive energy first, so the base of the pyramid has the greatest available amount.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Producers receive energy first, so the base of the pyramid has the greatest available amount.

6. QuestionMultiple choice

Why can an ecosystem support many plants but fewer top predators?

Please select an answer first.

Correct answer: B

The correct answer is Energy and biomass generally decrease as energy moves through trophic levels..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Less available energy at higher levels limits how many consumers an ecosystem can support.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Less available energy at higher levels limits how many consumers an ecosystem can support.

7. QuestionMultiple choice

If grass stores 1,000 units of energy, which level would generally receive the least energy?

Please select an answer first.

Correct answer: C

The correct answer is A hawk at the top of a grassland food chain.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Energy decreases through each transfer, so the top consumer receives the least available energy.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Energy decreases through each transfer, so the top consumer receives the least available energy.

8. QuestionMultiple choice

What happens to much of the energy an organism obtains from food?

Please select an answer first.

Correct answer: D

The correct answer is It is used for life processes and eventually released as heat..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Organisms use energy for life functions, and some energy leaves the system as heat.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Organisms use energy for life functions, and some energy leaves the system as heat.

9. QuestionMultiple choice

Why are food chains usually short?

Please select an answer first.

Correct answer: A

The correct answer is Only a small portion of energy is transferred to the next trophic level..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Limited energy transfer makes it difficult to support many levels of consumers.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Limited energy transfer makes it difficult to support many levels of consumers.

10. QuestionMultiple choice

How can a food web provide more information than one food chain?

Please select an answer first.

Correct answer: B

The correct answer is It shows multiple energy pathways and feeding relationships in the ecosystem..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: A web includes overlapping chains and shows that organisms may have several food sources or predators.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

A web includes overlapping chains and shows that organisms may have several food sources or predators.

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Frequently asked questions about Grade 6 Food Webs and Energy Flow

What topics are covered?

The page covers food chains, food webs, arrows, producers, consumers, decomposers, trophic levels, energy pyramids, energy transfer, matter cycling, and population changes.

How should students read a food web?

Begin with a producer and follow each arrow toward the organism that receives energy. Then identify the feeding role and consider how a change could affect connected populations.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 6 Food Webs and Energy Flow questions in total.