Chapter 3 test

Front

Earth is a(n) ________________ system.

Back

Closed

Front

If an ecosystem has a total amount of 30 carbon atoms at year one, how many total carbon atoms would they have after 5 years?

Back

30 carbon atoms

Front

An organism that gets energy storage molecules by breaking down dead matter is called a ________________.

Back

decomposer

Front

An increase in one part of the ecosystem means there is a ____________ in another part of the ecosystem.

Back

decrease

Front

A closed ecosystem made by humans for research is called a ________________.

Back

biodome

Front

What is a closed system in terms of ecology?

Back

A system where no matter enters or leaves, only energy can flow in and out.

Front

Define a decomposer in an ecosystem.

Back

An organism that breaks down dead organic material, returning nutrients to the soil.

Front

What happens to the number of organisms in an ecosystem if one species increases significantly?

Back

Another species may decrease due to competition for resources.

Front

What is the role of producers in an ecosystem?

Back

Producers create energy through photosynthesis, forming the base of the food chain.

Front

What is an example of a primary consumer?

Back

Herbivores like rabbits or deer that eat plants.