PWMS Food Webs & Energy Flow

PWMS Food Webs & Energy Flow

Multiple Choice

Who are the primary consumers in this food web?

• The lizard and the Hawk

• The Grasshopper and the Mouse

• The rabbit and the Hawk

• The lizard and the snake

Multiple Choice

An organism that eats the secondary consumer.

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer

• Consumer

Multiple Choice

Organisms that cannot make their own food and must obtain energy from external sources are called

• autotrophs

• heterotrophs

• thylakoids

• plants

Multiple Choice

What do the arrows indicate in a food web?

• What eats what

• Where the energy is being transferred

• How the animals are related

Multiple Choice

Which of the following organisms can be both a secondary and a tertiary consumer?

• Lizard and small reptiles

• badgers

• ground squirrels

• mountain lion

Multiple Choice

An organism that lives by breaking apart dead organic matter into simpler parts is...

• scavenger

• consumer

• decomposer

• carnivore

Multiple Choice

What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.

• The number of primary consumers would increase.

• The number of plants would increase.

• The number of secondary consumers would increase.

Multiple Choice

Several owls live in a forest. The owls prey on mice. Hawks also prey on mice. Which might happen if several hawks move to the forest where the owls live?

• The number of owls will increase, and the number of hawks will decrease.

• The number of mice will increase, and the number of owls will decrease.

• The number of owls and hawks will increase.

• The number of owls and mice will decrease.

Multiple Choice

The diagram shows the cycling of nutrients in an ecosystem. The removal of which of the following groups would cause an immediate decrease in the amount of energy flowing through the system?

• Producers

• Consumers

• Decomposers

• Inorganic nutrients