Matter and Energy in Ecosystems

What is a scavenger?

• rabbit

• cow

• vulture

• squirrel

Which organism is a decomposer?

• fern

• rat

• eagle

• mushroom

Which BEST describes the difference between a food chain and food web?

• a food web has several overlapping food chains

• a food web has scavengers and decomposers

• a food web has different organisms from those in a food chain.

• a food web has producers; a food chain has consumers.

Why are decomposers important in an ecosystem?

• They break down dead organisms into simpler materials.

• They cause dangerous illnesses.

• They kill scavengers, which are harmful to an ecosystem.

• They remove nutrients and organic matter from the soil.

How is energy supplied to a food web?

• Plants carry out photosynthesis.

• Decomposers release nutrients

• Predators consume prey

• scavengers eat dead organisms

Carnivores, omnivores, herbivores, and scavengers are all

• producers

• prey

• consumers

• predators

Which pair of organisms has a predator and prey relationship?

• corn plant and crow

• fox and rabbit

• bee and flowering plant

• squirrel and rabbit

Tags

NGSS.MS-LS2-4

Damming a lake would be harmful to some ecosystems because it would

• stop bacteria from breaking down matter in soil

• cause the ecosystem to receive less rainfall

• cause all of the fish in the lake to die

• stop the river from depositing rich soil along its banks

A skunk is an omnivore so it eats

• plants and animals

• only live animals

• only dead animals

• only plants

What would most likely happen to plants in an ecosystem if there was a drought?

• The population of the plants will increase.

• The population of plants will increase because they will have more sunlight.

• The population will stay the same.

• The population will decrease because they will have limited water resources.