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Ecosystem Energy and Matter Dynamics

Ecosystem Energy and Matter Dynamics

Assessment

Interactive Video

Biology, Science, Chemistry

6th - 8th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video explains how energy flows through food chains and how matter cycles in ecosystems. Energy starts with the sun, moves through producers, consumers, and decomposers, with only 10% transferred at each level. Disruptions in food chains can impact the entire ecosystem. Matter cycles, like carbon and water, are essential for sustainability, with decomposers playing a key role. These processes maintain ecosystem health and balance, supporting biodiversity.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two main processes that keep ecosystems running smoothly?

Energy flow and matter cycling

Photosynthesis and respiration

Migration and hibernation

Predation and competition

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary source of energy in a food chain?

The sun

Producers

Consumers

Decomposers

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What percentage of energy is typically transferred from one trophic level to the next in a food chain?

50%

1%

100%

10%

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the energy that is not transferred to the next level in a food chain?

It is recycled back to the sun

It is stored in the organism

It is converted into matter

It is used for the organism's life processes or lost as heat

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What could be a consequence of a disease that reduces plant populations in a forest?

Stability in the ecosystem

Increase in plant diversity

Decrease in predator populations

Increase in herbivore populations

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does matter move through an ecosystem?

In a straight line

Only through water

In cycles

Randomly

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which cycle involves the process of photosynthesis and respiration?

Oxygen cycle

Carbon cycle

Water cycle

Nitrogen cycle

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