Energy Flow In Ecosystems Review Quiz

1. Which organisms get their energy directly from the sun?

Grass

Rabbits

Snakes

Hawks

Producers get their energy directly from the sun through photosynthesis. Consumers get their energy indirectly from the sun, when they eat producers.

Explanation

Producers get their energy directly from the sun through photosynthesis. Consumers get their energy indirectly from the sun, when they eat producers.

2. What is the producer in this ecosystem?

Kelp

Sea Urchin

Sheephead

Giant Sea Bass

Producers, who make their own energy through photosynthesis, are always the bottom level of an energy pyramid.

Explanation

Producers, who make their own energy through photosynthesis, are always the bottom level of an energy pyramid.

3. Where does all the energy in an ecosystem come from?

The sun

The wind

Producers

Tertiary Consumers

All the energy on Earth comes from the sun.

Explanation

All the energy on Earth comes from the sun.

4. Match the organisms with the their correct level on the energy pyramid.

Producer

Primary Consumer

Secondary Consumer

Tertiary Consumer

Producers are always located on the first level of an energy pyramid, followed by primary consumers, secondary consumers, and tertiary consumers as you move up the pyramid.

Explanation

Producers are always located on the first level of an energy pyramid, followed by primary consumers, secondary consumers, and tertiary consumers as you move up the pyramid.

Submit

5. _____________ produce their own glucose through photosynthesis, while _____________ get their glucose from eating other organisms.

Consumers, Producers

Producers, Consumers

Herbivores, Carnivores

Carnivores, Herbivores

Producers, such as plants, make glucose from sunlight using photosynthesis. Consumers cannot use make glucose from sunlight (because they do not have chloroplasts), so they must eat other organisms to get glucose.

Explanation

Producers, such as plants, make glucose from sunlight using photosynthesis. Consumers cannot use make glucose from sunlight (because they do not have chloroplasts), so they must eat other organisms to get glucose.

6. Which organism receives the most energy from the producers?

Rabbits

Snakes

Hawks

Since the rabbits (the primary consumers) eat the producers directly, they get the most energy from them.

Explanation

Since the rabbits (the primary consumers) eat the producers directly, they get the most energy from them.

7. How much energy consumed by the rabbit gets passed on to the snake, when it eats the rabbit?

0.1%

1%

10%

100%

The 10% rule in energy flow states that only 10% of an organisms energy gets passed on when it gets consumed (eaten).

Explanation

The 10% rule in energy flow states that only 10% of an organisms energy gets passed on when it gets consumed (eaten).

8. The amount of energy ______________ as you move through an energy pyramid.

Increases

Decreases

Fluctuates

Remains the same

Producers (at the bottom) get the most energy directly from the sun through photosynthesis. Then as you move up each step in the pyramid, 90% of energy gets lost at each step.

Explanation

Producers (at the bottom) get the most energy directly from the sun through photosynthesis. Then as you move up each step in the pyramid, 90% of energy gets lost at each step.

9. What organism has the least energy in the ecosystem?

Kelp

Sea Urchin

Sheephead

Giant Sea Bass

Energy is lost to heat as you move up the energy pyramid, so the top level (in this case the tertiary consumers) always have the least energy in the ecosystem.

Explanation

Energy is lost to heat as you move up the energy pyramid, so the top level (in this case the tertiary consumers) always have the least energy in the ecosystem.

10. Why is a pyramid shape used to represent the energy flow in an ecosystem?

The amount of energy decreases as you move up the pyramid.

The size of the organisms decreases as you move up the pyramid.

The amount of energy increases as you move up the pyramid.

The number of organisms increases as you move up the pyramid.

The amount of energy decreases as you move up the pyramid, just like the size of the pyramid decreases as you move up pyramid.

Explanation

The amount of energy decreases as you move up the pyramid, just like the size of the pyramid decreases as you move up pyramid.

11. What is the primary consumer in this ecosystem?

Kelp

Sea Urchin

Sheephead

Giant Sea Bass

Primary consumers are always the 2nd level of the energy pyramid. They get their energy from the producers.

Explanation

Primary consumers are always the 2nd level of the energy pyramid. They get their energy from the producers.

12. What happened to 90% of the rabbits' energy that did not get passed on when the snakes ate it?

It was transferred to the grass.

It disappeared when the rabbit dies.

It was lost to heat as the rabbit used the energy when it was alive.

It returns to the sun.

Most of the energy (90%) that an organism gets from its food is used by the organism and lost to heat.

Explanation

Most of the energy (90%) that an organism gets from its food is used by the organism and lost to heat.

13. What organism has the most energy in the ecosystem?

Kelp

Sea Urchin

Sheephead

Giant Sea Bass

Producers, who make their own energy through photosynthesis, have the most energy. Energy is lost to heat as it moves up the energy pyramid.

Explanation

Producers, who make their own energy through photosynthesis, have the most energy. Energy is lost to heat as it moves up the energy pyramid.

14. What organism(s) in this ecosystem perform photosynthesis to make glucose?

Kelp only

Sea Urchin, Sheephead, and Giant Sea Bass only

Kelp and Sea Urchin only

Kelp, Sea Urchin, Sheephead, and Giant Sea Bass

Producers (usually plants) are the only organisms that can produce their own glucose through photosynthesis.

Explanation

Producers (usually plants) are the only organisms that can produce their own glucose through photosynthesis.

15. What organism(s) in this ecosystem perform cellular respiration to make ATP?

Kelp only

Sea Urchin, Sheephead, and Giant Sea Bass only

Kelp and Sea Urchin only

Kelp, Sea Urchin, Sheephead, and Giant Sea Bass

All organisms (plants and animals) must use cellular respiration to turn glucose into ATP. So all organisms in this ecosystem (plants and animals) use cellular respiration.

Explanation

All organisms (plants and animals) must use cellular respiration to turn glucose into ATP. So all organisms in this ecosystem (plants and animals) use cellular respiration.

Energy Flow In EcoSystems Review Quiz