Food Webs / Energy Pyramids

Front

What do the arrows in a food chain or web represent?

Back

They show what direction the energy is flowing between organisms.

Front

What is a secondary consumer in a food web?

Back

A secondary consumer is an organism that eats primary consumers; for example, a snake.

Front

About how much percent of energy is passed on from one organism to the next in a food web pyramid?

Back

10 percent of all energy gets passed.

Front

How does the wolf population affect the rabbit population?

Back

The rabbit population controls the wolf population.

Front

What is a possible hypothesis for a significant increase in deer population?

Back

The deer's main predator has been eliminated.

Front

What is a food web?

Back

A food web is a complex network of feeding relationships among organisms in an ecosystem.

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

Define primary consumer.

Back

A primary consumer is an organism that eats producers (plants), such as a rabbit.

Front

What is an energy pyramid?

Back

An energy pyramid is a graphical representation showing the flow of energy at different trophic levels in an ecosystem.

Front

What is a trophic level?

Back

A trophic level is a position in a food chain or web, defined by how many energy transfers away from the original source of energy (usually the sun) an organism is.