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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

Which statement best explains why a food web can change after a drought?

Please select an answer first.

Correct answer: A

The correct answer is Drought changes an abiotic factor that can affect plants, consumers, and predators..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Water availability is an abiotic factor that can alter several connected populations.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Water availability is an abiotic factor that can alter several connected populations.

2. QuestionMultiple choice

Which data would best show energy transfer in a grassland?

Please select an answer first.

Correct answer: B

The correct answer is Measurements of plant biomass and the biomass of herbivores and predators at different levels.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Biomass at trophic levels can help represent how much living material and energy are available.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Biomass at trophic levels can help represent how much living material and energy are available.

3. QuestionMultiple choice

If a new predator enters a food web, which question is most useful?

Please select an answer first.

Correct answer: C

The correct answer is How do prey populations and the predators that depend on those prey change over time?.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Tracking connected populations can reveal the new predators effects on the web.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Tracking connected populations can reveal the new predators effects on the web.

4. QuestionMultiple choice

Which conclusion is best supported if a graph shows fewer plants after herbivore numbers increase?

Please select an answer first.

Correct answer: D

The correct answer is More herbivores may have consumed plants faster than the plants could recover..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: The pattern is consistent with increased feeding pressure on producers.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

The pattern is consistent with increased feeding pressure on producers.

5. QuestionMultiple choice

What should a student label first when building an energy pyramid?

Please select an answer first.

Correct answer: A

The correct answer is The producer level at the base.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Producers form the base because they capture energy for the rest of the pyramid.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Producers form the base because they capture energy for the rest of the pyramid.

6. QuestionMultiple choice

Why should a food-web model include arrows and labels?

Please select an answer first.

Correct answer: B

The correct answer is They show the direction of energy transfer and identify the organisms involved..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Arrows and labels make the feeding relationships and energy direction readable.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Arrows and labels make the feeding relationships and energy direction readable.

7. QuestionMultiple choice

Which observation would show that an organism is likely a primary consumer?

Please select an answer first.

Correct answer: C

The correct answer is It eats leaves and seeds but does not make its own food..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: An organism that eats producers is a primary consumer.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

An organism that eats producers is a primary consumer.

8. QuestionMultiple choice

Why can energy not be recycled in an ecosystem in the same way as nutrients?

Please select an answer first.

Correct answer: D

The correct answer is Some energy is released as heat during life processes and is no longer available for food transfer..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Energy transformations release heat, while materials can be reused through cycles.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Energy transformations release heat, while materials can be reused through cycles.

9. QuestionMultiple choice

Which action would most likely preserve energy pathways in a local ecosystem?

Please select an answer first.

Correct answer: A

The correct answer is Protect native producers and habitats that support connected populations..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Protecting producers and habitats supports the base and connections of the food web.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Protecting producers and habitats supports the base and connections of the food web.

10. QuestionMultiple choice

What is the strongest conclusion from a complete food-web investigation?

Please select an answer first.

Correct answer: B

The correct answer is Energy enters through producers, moves among consumers, and matter is recycled by decomposers..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: This conclusion summarizes the central principles of food webs and ecosystem transfer.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

This conclusion summarizes the central principles of food webs and ecosystem transfer.

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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.