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1 Ecological Systems and Energy Flow Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Ecological Systems and Energy Flow, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: The boundary chosen for studying an ecosystem can depend on the question being investigated.

  1. A

    True

  2. B

    False

02
Choose one
1 point

A researcher considers frogs, algae, and microbes, their interactions, and the pond's water and temperature. Which ecological level is being studied?

  1. A

    A group of frogs of the same species living in a pond

  2. B

    Frogs, algae, and microbes interacting with the pond's water and temperature

  3. C

    All the frogs, algae, and microbes living in a pond

  4. D

    The pond's water, temperature, and soil considered without organisms

03
Fill in the blank
1 point

Each position in a feeding sequence is called a .

04
Choose one
1 point

Why does a food web generally represent feeding relationships in an ecosystem better than a single food chain?

  1. A

    It shows only one route by which energy passes between organisms.

  2. B

    It shows that energy cycles back and is reused by producers.

  3. C

    It connects multiple food chains and shows overlapping feeding relationships.

  4. D

    It includes only organisms that eat producers.

05
True or false
1 point

True or false: Energy is recycled through ecosystems for reuse in the same way that matter is recycled.

  1. A

    True

  2. B

    False

06
Fill in the blank
1 point

Producers take up water, carbon, and nutrients from their surroundings and incorporate them into molecules.

07
Written response
1 point

What is the ecological term for members of the same species living in one area?

08
Written response
1 point

What process allows a plant to capture light energy and store it in organic molecules?

09
Choose one
1 point

Why is less energy available to support organisms at each successively higher trophic level?

  1. A

    Higher-level consumers return all the energy they take in to producers.

  2. B

    Organisms use energy for life processes, and some energy is released as heat.

  3. C

    Matter stops cycling when it reaches a higher trophic level.

  4. D

    Producers capture more sunlight whenever consumers are added.

10
Choose one
1 point

A producer near a deep-sea vent does not rely on sunlight. According to the material, what can provide its energy instead?

  1. A

    They obtain energy only by eating animals.

  2. B

    They capture light that reaches the deep-sea floor.

  3. C

    They obtain energy from chemical reactions.

  4. D

    They reuse heat released by consumers.

11
Open ended
1 point

Explain how energy and matter move through an ecosystem. Include why energy becomes less available at higher trophic levels and how matter can be used again.

12
True or false
1 point

True or false: Energy flows through an ecosystem and eventually leaves as heat, whereas matter can be recycled between organisms and the nonliving environment.

  1. A

    True

  2. B

    False

13
Choose one
1 point

A field team studies frogs, insects, plants, and fungi in a field, along with their interactions and conditions such as soil and temperature. What is the team studying?

  1. A

    The frogs and insects living in the field, but not the conditions around them

  2. B

    The organisms in the field, their interactions, and the nonliving environment being studied

  3. C

    All organisms of one species living in the field

  4. D

    The plants and animals living in the field, but not fungi or microorganisms

14
Choose one
1 point

A biologist wants to represent several connected feeding routes in a pond, where one organism may be part of more than one chain. Which model is most suitable?

  1. A

    A population, because it includes organisms living in one area

  2. B

    A food chain, because it shows only one route of energy transfer

  3. C

    A food web, because it connects multiple feeding routes

  4. D

    A trophic level, because it includes organisms with different diets

15
Written response
1 point

What is the process called in which matter moves between organisms and the nonliving environment and can be taken up again?

16
Choose one
1 point

In the food chain grass → grasshopper → frog → snake, which statement correctly identifies a trophic role?

  1. A

    The grasshopper is a primary consumer because it eats grass

  2. B

    The frog is a primary consumer because it eats the grasshopper

  3. C

    The snake is a producer because it is at the end of the chain

  4. D

    The grass is a consumer because it provides energy to the grasshopper

17
Written response
1 point

What ecological role is performed by organisms that break down dead organisms and waste?

18
Choose one
1 point

A dry spell limits which plants can grow in a field, changing the food and shelter available to animals. Which factor is the abiotic condition that initiates this effect?

  1. A

    The number of plant species in the field

  2. B

    Competition among the field's plant populations

  3. C

    Shelter provided by plants to animals

  4. D

    Water availability in the soil

19
Choose all
1 point

Which observations illustrate direct interactions between organisms? Select all that apply.

  1. A

    Two species use the same limited water source.

  2. B

    A bird eats insects.

  3. C

    Two species each benefit from their relationship.

  4. D

    A drop in temperature slows plant growth, with no organism acting on another.

20
Choose all
1 point

A field study records several observations. Which ones provide evidence of interactions between organisms, rather than just their presence in the same area? Select all that apply.

  1. A

    Two species repeatedly compete for the same scarce nesting sites.

  2. B

    An animal obtains food by eating a plant.

  3. C

    Both species benefit from an association between them.

  4. D

    Two species are found in the same area, but no effect of one on the other is observed.