Trophic Levels and Food Chain

Question 1

Define Autotroph

Answer 1

An organism that can produce its own food using light, water, carbon dioxide, or other chemicals.

Question 2

Define Heterotroph

Answer 2

An organism that eats other plants or animals for energy and nutrients.

Question 3

Define Keystone Species

Answer 3

An organism that helps define an entire ecosystem.

Question 4

Define Trophic Cascade

Answer 4

An ecological phenomenon triggered by the addition or removal of top predators and involving reciprocal changes in the relative populations of predator and prey through a food chain.

Question 5

What are Trophic Levels?

Answer 5

The positions of organisms on the food chain.

Question 6

What’s the difference between a food web and a trophic cascade diagram?

Answer 6

Food webs show what eats what while trophic Cascade diagrams show how each species affects the other.

Question 7

How do you identify a species trophic level in a food web?

Question 8

How does a species indirectly positively affect another species?

Answer 8

If it negatively affects a species that negatively affects another

Question 9

How does a species indirectly negatively affect another species?

Answer 9

If it indirectly positively affects a species that negatively affects another.

Question 10

Name the trophic levels.

Answer 10

Primary producers (plants), primary consumers (herbivores), secondary consumers, tertiary consumers, and detritivores (decomposers).