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Ecology l.17.1

Authored by undefined Graham

Science

7th Grade

Used 9+ times

Ecology l.17.1
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17 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What might most likely happen if an ecosystem lost all its decomposers?

Consumers would not be able to obtain food and their populations would quickly decrease.

Nutrients would remain in waste products and remains of dead organisms, and would not be recycled.

The food web would gain nutrients because there would be no organisms breaking them down or consuming them.

Producers would multiply until they reached the carrying capacity of the habitat.

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Think of all the components that contribute to the flow of energy and matter in a food web. Which of the following groups forms the base of the food web?

consumers

decomposers

producers

scavengers

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

This food chain shows some of the plants and animals that could be observed in a meadow ecosystem. What is the source of energy for the snake?

the toad

the owl

the beetle

green plants

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

All organisms take energy from their environment. Every organism needs this energy in order to grow and reproduce. How do producers get energy?

They obtain energy by eating plants, bacteria, and algae.

They extract chemical energy from decaying organic matter.

They extract energy from the chemicals in soil, air, and water.

They capture energy from sunlight and manufacture their own food.

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Each organism has its own role in an ecosystem. Organisms can be producers, consumers, or decomposers. Which of these organisms can be classified as a decomposer?

Media Image
Media Image
Media Image
Media Image

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A healthy ecosystem must have producers, consumers, and decomposers. Most decomposers are either fungi or bacteria. Why are decomposers an essential part of a healthy ecosystem?

Decomposers are a necessary part of the diet of most consumers.

Decomposers convert plant material into a form that primary consumers can use.

Decomposers make resources available to producers by breaking down waste materials.

Decomposers extract energy from sunlight as they break down plant materials, adding energy to the system.

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the primary source of energy used by producers during photosynthesis?

thermal energy from the sun

light energy from the sun

chemical energy from food and oxygen

chemical energy from carbon dioxide and water

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