Food Chain and Food Webs and Trophic Levels Practice Test

Front

What is a food chain?

Back

A food chain is a linear sequence that shows how energy and nutrients flow from one organism to another in an ecosystem, starting from producers to various levels of consumers.

Front

What is a food web?

Back

A food web is a complex network of interconnected food chains in an ecosystem, illustrating how different organisms are related through feeding relationships.

Front

What are trophic levels?

Back

Trophic levels are the hierarchical levels in an ecosystem, defined by the position of organisms in the food chain, including producers, primary consumers, secondary consumers, and tertiary consumers.

Front

Why do higher trophic levels contain fewer organisms?

Back

Higher trophic levels contain fewer organisms because energy decreases as it moves up the food chain, leading to less energy available for organisms at higher levels.

Front

What role do producers play in an ecosystem?

Back

Producers convert solar energy into chemical energy through photosynthesis, forming the base of the food chain.

Front

What are primary consumers?

Back

Primary consumers are organisms that eat producers; they are typically herbivores that obtain energy by consuming plants.

Front

What are secondary consumers?

Back

Secondary consumers are organisms that eat primary consumers; they can be carnivores or omnivores.

Front

What are tertiary consumers?

Back

Tertiary consumers are organisms that eat secondary consumers; they are often top predators in the food chain.

Front

What is an energy pyramid?

Back

An energy pyramid is a graphical representation that shows the distribution of energy among trophic levels in an ecosystem, illustrating that energy decreases as it moves up the pyramid.

Front

What happens if a population of primary consumers decreases?

Back

If the population of primary consumers decreases, it can lead to an increase in producers and a decrease in secondary consumers due to lack of food.