Populations and Ecosystems Unit Post Test

Front

What is a population in an ecosystem?

Back

A population is a group of individuals of the same species living in a specific area.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their environment.

Front

What is a food chain?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is a trophic level?

Back

A trophic level is a position in a food chain or food web, representing the flow of energy and nutrients.

Front

What are producers in an ecosystem?

Back

Producers are organisms that create their own food through photosynthesis, such as plants.

Front

What are consumers in an ecosystem?

Back

Consumers are organisms that eat other organisms for energy, including herbivores, carnivores, and omnivores.

Front

What is a decomposer?

Back

Decomposers are organisms that break down dead material and waste, returning nutrients to the soil.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which plants use sunlight, carbon dioxide, and water to create sugar and oxygen.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which organisms break down sugar and oxygen to produce energy, carbon dioxide, and water.

Front

How does a decrease in one population affect others in an ecosystem?

Back

A decrease in one population can lead to an increase in its food source and a decrease in its predators.