Ecosystems Chapter 4 Science

Which event would cause an ecosystem to change quickly?

• a climate change

• an earthquake

• a lake drying up

• a rock becoming soil

Nonnative animal populations can grow rapidly in a new ecosystem because

• predators in the ecosystem are not used to hunting them.

• they have not competition for resource in the ecosystem

• nonnative species are always at the top of the food chain.

• they are producers.

The relationship between an owl and a mouse is an example of

• producer and consumer.

• predator and prey.

• symbiosis.

• competition.

What is the source of energy for most plants?

• water

• sunlight

• clouds

• animals

During cellular respiration, organisms give off

• nitrogen.

• oxygen.

• carbon dioxide.

• water vapor.

Which describes both a food chain and a food web?

• both begin with a producer

• both only contain consumers

• both contain multiple ways that energy flows

• both contain only consumers.

The shortest food chains begin with

• two consumers.

• two producers.

• a producer and a decomposer

• a consumer and a decomposer.

During photosynthesis, plants give off

• nitrogen

• oxygen

• water vapor

• carbon dioxide.