Populations and Ecosystems Unit Post Test

Front

What is biomass?

Back

Biomass is the total mass of living matter in a given area or volume, often used to measure the amount of energy available in an ecosystem.

Front

How does biomass transfer between trophic levels?

Back

A small fraction of the biomass at a trophic level becomes biomass at the next higher level.

Front

What is a biotic factor?

Back

A biotic factor is a living component of an ecosystem, such as plants, animals, and microorganisms.

Front

What is an abiotic factor?

Back

An abiotic factor is a non-living component of an ecosystem, such as sunlight, water, and minerals.

Front

What role do producers play in an ecosystem?

Back

Producers convert sunlight into usable energy through photosynthesis, creating biomass for other organisms.

Front

What is the chemical equation for photosynthesis?

Back

6CO2 + 6H2O + light energy → sugar + 6O2.

Front

How does energy enter an ecosystem?

Back

Energy enters an ecosystem primarily through sunlight.

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 food web?

Back

A food web is a complex network of interconnected food chains in an ecosystem.

Front

What are primary consumers?

Back

Primary consumers are organisms that eat producers; they are typically herbivores.