Cycling of Matter and Energy: Food Chains and Food Webs Quiz

A group of organisms within an ecosystem is called a(n)

Which of the following statements best explains the key difference(s) between a food chain and a food web?

Energy cannot be created or destroyed.

A food web shows the more complex movement of energy and matter within an ecosystem.

Only a small fraction of matter consumed at the lower levels of a food web are transferred upward.

Since only a small amount of energy moves up in each level of the food web, the higher up the food web the consumer is, the more he has to consume. Therefore, there are generally fewer organisms at higher levels of a food web.

Gain energy and matter by consuming producers.

Gain energy and matter through photosynthesis

Consume secondary consumers

Break down dead organisms

Also known as a producer

Consumes both producers and consumers

Break down dead organism and move matter and energy back into the soil

Also known as a consumer