Free Practice Quiz Question List

08 Ecosystems and Energy Flow Online Quiz Questions

Use this free practice quiz with 20 questions to review 08 Ecosystems and Energy Flow, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

Decomposers obtain material only from primary consumers.

A
True
B
False

Choose one

1 point

In the food chain grass → grasshopper → frog → snake, what does each arrow show?

A
From the organism that eats to the organism that is eaten
B
From the organism or material being eaten to the organism that eats it
C
From the organism with less energy to the organism with more energy
D
From decomposers to the organisms whose remains they break down

Fill in the blank

1 point

An organism that makes organic molecules using sunlight or chemical energy is a .

Choose all

1 point

Select all the abiotic components of an ecosystem.

A
Sunlight
B
Algae
C
Air
D
Soil
E
Temperature

Choose one

1 point

In the food chain grass → grasshopper → frog → snake, what trophic role does the frog have?

A
Producer
B
Primary consumer
C
Secondary consumer
D
Tertiary consumer

Written response

1 point

What term describes an organism’s feeding position in a food chain or food web?

Fill in the blank

1 point

When many food chains connect within a community, they form a .

Choose all

1 point

Select all the accurate statements about omnivores and detritivores.

A
An omnivore can feed at more than one trophic level.
B
An omnivore always occupies the same trophic level as a producer.
C
An earthworm is a detritivore that consumes dead organic material.
D
A detritivore makes organic molecules from sunlight.

True or false

1 point

Energy transfer from one trophic level to the next is exactly 10% in every ecosystem.

A
True
B
False

Choose one

1 point

Some bacteria use chemical energy rather than sunlight to make organic molecules. What ecosystem role do they have?

A
Consumer
B
Detritivore
C
Decomposer
D
Producer

Written response

1 point

Using the 10% teaching approximation, about how many energy units would be available to the next trophic level if producers store 10,000 energy units?

Choose one

1 point

What does each level of an energy pyramid represent?

A
The total number of species at each feeding position
B
The energy transferred over a given area and time at each level
C
The amount of matter permanently lost at each feeding position
D
The number of food chains that begin with each consumer

Open ended

1 point

Explain how matter and energy move differently through an ecosystem.

Choose one

1 point

A field contains plants, insects, and birds. Which listed feature is an abiotic component of this ecosystem?

A
The plants and animals living in the area
B
Temperature in the area
C
The populations of organisms in the area
D
The interactions among organisms

Choose one

1 point

In the food chain algae → insect → fish, what does the arrow from the insect to the fish indicate?

A
The fish is eaten by the insect.
B
The insect and fish exchange energy in both directions.
C
Energy is transferred from the insect to the fish.
D
The fish transfers energy to the insect.

Choose one

1 point

In the food chain grass → grasshopper → frog → snake, which organism is the primary consumer?

A
The grasshopper
B
The frog
C
The snake
D
The grass

Choose one

1 point

Which statement best describes how most producers obtain and store energy?

A
They obtain energy only by eating other organisms.
B
Most capture sunlight through photosynthesis and store energy in organic molecules.
C
They break down dead organisms and release nutrients.
D
They use energy only to produce heat.

True or false

1 point

Matter is recycled through ecosystems, whereas energy flows through them and ultimately dissipates as heat.

A
True
B
False

Written response

1 point

What is the name of a representation showing that less energy is available at higher trophic levels?

Written response

1 point

Assume the 10% teaching approximation applies at each transfer. If producers store 10,000 energy units, about how many energy units become available to secondary consumers, two transfers later?