Matter and Energy in Ecosystems

LIVING things in an ecosystem ….

• biotic

• abiotic

• ecosystem

True or False:

A food web shows how energy flows through an ecosystem

• true

• false

If there is a change in the environment, the organism will either die or have to leave

true or false

• true

• false

What is a food web?

• a model that contains many food chains

• a model that contains one food chain

• a model that shows where the sun gets its energy

• a model that shows how decomposers break down organisms

What do scientist call organisms that are not native to an ecosystem and cause harm to native organisms?

• native plants
• invaders
• invasive species
• natural species

What is a producer?

• organism that cannot make their own food so they eat other organisms

• organism that makes their own food

• organism that break down dead organisms

What is a decomposer?

• an organism that breaks down dead organisms for energy

• an organism that makes its own food

• an organism that eats other organisms

Rocks, air, sunlight and water are examples of ….

• an ecosystem

• biotic factors

• abiotic factors

All of the living and nonliving components that interact in an environment.

• population

• ecosystem

• community

• organism

In a pond ecosystem, what would happen to frogs if the insect population decreased?

• There would be more frogs in the pond.

• There would be more insects in the pond.

• There would be less frogs in the pond.

• More fish would move to the pond.