Energy Flow

sunlight → grass → panther → rabbit

grass → sunlight → rabbit → panther

sunlight → grass → rabbit → panther

panther → rabbit → grass → sunlight

Level 1

Level 2

Level 3

Level 4

Cricket and snake

Mouse and panther

Snake and mole

Panther and rabbit

The mouse population would increase because one of their predators was removed.

The rabbit population would increase because one of their predators was removed.

The mouse population would increase because they have less competition.

The rabbit population would increase because they have less competition.

Student 1 is correct because the amount of energy available to the top heterotroph is reduced.

Student 2 is correct because the amount of energy at the autotroph level is reduced.

Student 1 is correct because the amount of energy available to the top heterotroph is increased.

Student 2 is correct because the amount of energy available to the autotroph and the heterotroph is the same.

Decomposers

Heterotrophs

Sunlight

Autotrophs

Omnivore population sizes increase, and herbivore population sizes increase.

Omnivore population sizes decrease, and carnivore population sizes increase

Herbivore population sizes increase, and carnivore population sizes decrease.

Herbivore population sizes decrease, and carnivore population sizes decrease.

A food web shows the number of organisms in each population.

A food web predicts how a group of organisms will change over time.

A food web shows how matter and energy flow through an ecosystem.

A food web is used to identify the populations in an ecosystem.

The diversity of plants and animals in the ecosystem would increase.

The number of plants would decrease because there would be less recycling of nutrients.

The number of herbivores and omnivores in the ecosystem would increase due to lack of disease.

There would be more energy available for insects and worms that live in the soil.

Level A

Level B

Level C

Level D