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Ecosystem Dynamics and Community Interactions

Ecosystem Dynamics and Community Interactions

Assessment

Interactive Video

Biology, Science, Geography

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers ecosystems, communities, and the concept of limiting factors affecting organisms. It explains the range of tolerance and provides examples like the sealhead trout. The lesson then shifts to ecological succession, distinguishing between primary and secondary succession, and describes the stages leading to a climax community. Visual examples are provided to illustrate these concepts, and the lesson concludes with a summary and invitation for questions.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary difference between a community and an ecosystem?

A community includes abiotic factors, while an ecosystem does not.

An ecosystem includes abiotic factors, while a community does not.

A community is larger than an ecosystem.

An ecosystem is a group of communities interacting with each other.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a limiting factor for organisms?

Climate

Soil chemistry

Available space

Genetic mutation

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the sealhead trout when the temperature is below 9 Celsius?

It thrives and reproduces rapidly.

It struggles but survives.

It dies immediately.

It migrates to a warmer area.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is ecological succession?

The process of one community replacing another over time.

The gradual change in climate over time.

The adaptation of organisms to their environment.

The extinction of species due to limiting factors.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In primary succession, what is the role of lycians?

They are the first plants to grow in disturbed areas.

They provide shade for other plants.

They decompose dead plants.

They colonize bare rock and help form soil.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first stage of primary succession?

Growth of perennial herbs

Colonization by lycians

Formation of grasses and shrubs

Development of shade intolerant trees

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What distinguishes secondary succession from primary succession?

Secondary succession occurs on bare rock.

Secondary succession does not involve any plant growth.

Secondary succession starts with lycians.

Secondary succession begins with existing topsoil.

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