Energy Flow Enviro 2026

Multiple Choice

Which process allows plants to convert sunlight into energy that can be used by other organisms in the food chain?

• Respiration

• Photosynthesis

• Digestion

• Fermentation

Open Ended

Why is energy important for all living things in an ecosystem?

Hotspot

Identify the photosynthesis reaction.

Multiple Choice

Plants converts sunlight into energy, and what are the main products of this process?

• Photosynthesis; glucose and oxygen

• Cellular respiration; carbon dioxide and water

• Fermentation; alcohol and carbon dioxide

• Transpiration; water and oxygen

Fill in the Blanks

Fill in the blank: Organisms that make their own food using photosynthesis are called

.

Categorize

Options (5)

Sunflower

Cougar

Mouse

Raccoon

Snake

Place the organisms in the correct category.

Producer

Consumer

Open Ended

Explain the relationship between producers and consumers in an ecosystem.

Multiple Select

Which of the following are examples of herbivores?

• Grasshoppers

• Rabbits

• Squirrels

• Lions

Multiple Choice

Which of the following best describes the role of a predator in an ecosystem?

• A consumer that hunts and kills other consumers

• A consumer that eats plants only

• A consumer that eats dead consumers

• A producer that makes its own food

Multiple Choice

What is the main difference between decomposers and predators?

• Decomposers eat dead consumers, while predators hunt and kill living consumers.

• Decomposers hunt and kill living consumers, while predators eat dead consumers.

• Decomposers make their own food, while predators eat plants.

• Decomposers are always plants, while predators are always animals.

Fill in the Blanks

Producers use most of the energy they make for themselves and are at the

of a food chain or web.

Multiple Select

Select all that apply: Which organisms can pass energy to other organisms in a food chain?

• Producers

• Primary consumers

• Secondary consumers

• Decomposers

Multiple Choice

Which of the following statements about primary consumers is correct?

• They eat producers to get energy and are herbivores.

• They eat other consumers and are carnivores.

• They decompose dead organisms.

• They produce their own food.

Multiple Choice

What happens to most of the energy that a primary consumer gets from the producer?

• It is used by the primary consumer.

• It is stored for the next consumer.

• It is given off as light.

• It is used by decomposers.

Fill in the Blanks

Some of the energy in a consumer is given off as

.

Multiple Select

Select all that apply: What are possible characteristics of a secondary consumer?

• May be a carnivore

• May be an omnivore

• May be a predator

• May be a producer

Multiple Choice

Which of the following statements about secondary consumers is correct?

• They eat other consumers for energy.

• They only eat plants.

• They are always decomposers.

• They do not lose energy as heat.

Multiple Choice

What happens to the energy that is not lost as heat in a consumer?

• It is stored to be passed on to another consumer.

• It disappears completely.

• It is used by plants.

• It is converted to water.

Multiple Choice

What is a consumer that eats a consumer that already ate a consumer called?

• 3rd order or tertiary consumer

• Producer

• Decomposer

• First order consumer

Labeling

Label each group as producers, consumers, or decmoposers.

Drag labels to their correct position on the image

Consumers

Producers

Decomposers

Multiple Select

Based on the food chain diagram, which of the following statements are correct?

• Energy decreases as you move up the food chain

• Producers have the most energy

• Top level consumers have the least energy

• First level consumers have the most energy

Labeling

Drag the labels below to the correct organism on the food chain

Drag labels to their correct position on the image

producer

2nd level consumer

1st level consumer

3rd level consumer

Open Ended

How does the number of organisms change as you move up the energy pyramid, and why does this happen?

Multiple Choice

What does the energy pyramid show about the relationship between producers, primary consumers, and higher order consumers?

• It takes a large number of producers to support a small number of primary consumers

• Energy increases as you move up the pyramid

• There are more top level consumers than producers

• Primary consumers have more energy than producers

Labeling

A food pyramid is shown to represent the transfer of energy in a food chain. Label the amount of energy available to each trophic level if producers have 10,000 kJ of energy.

Drag labels to their correct position on the image

9 kJ

900 kJ

100 kJ

100,000 kJ

1,000 kJ

10 kJ

1 kJ

9000 kJ

Multiple Choice

Which of the following best describes a food web?

• A diagram showing only one food chain in an ecosystem

• A group of producers in an ecosystem

• Interconnected food chains showing feeding relationships in an ecosystem

• A list of all animals in an ecosystem

Open Ended

Explain how the number of food chains in a food web can be determined using the diagram provided.

Labeling

Correctly label each trophic level

Drag labels to their correct position on the image

tertiary consumers

producers

secondary consumers

apex predator

primary consumers

Hotspot

Which organism is both a secondary and tertiary (3rd level) consumer?

Match

Match the organisms from the food web to their role.

• phytoplankton

• krill

• squid

• human

producer

primary consumer

secondary consumer

tertiary consumer

• producer

• primary consumer

• secondary consumer

• tertiary consumer

Draw

How many food chains are in this food web?