Ecosystem Dynamics and Interactions

Where does all the energy in an ecosystem originate from?

• The moon

• The soil

• The sun

• The wind

What are autotrophs?

• Organisms that eat other organisms for food

• Organisms that make their own food

• Organisms that decompose dead matter

• Organisms that only eat plants

Which type of consumer eats only plants?

• Herbivore

• Carnivore

• Omnivore

• Decomposer

Based on the food chain diagram, which group do primary producers belong to?

• Autotrophs

• Heterotrophs

• Carnivores

• Omnivores

What does a food chain represent in an ecosystem?

• A single pathway by which energy, matter, and mass flow through an ecosystem.

• Multiple pathways by which energy, matter, and mass flow through an ecosystem.

• The total number of organisms in an ecosystem.

• The amount of sunlight received by plants.

Why are food chains considered simpler than what actually happens in nature?

• Because most organisms are eaten by more than one species.

• Because food chains include all organisms in an ecosystem.

• Because food chains show only plants.

• Because food chains do not show energy flow.

Why are food webs considered a more accurate representation of ecosystems than food chains?

• They show which organisms consume (or are consumed by) other species.

• They only show producers and decomposers.

• They ignore the flow of energy.

• They only show one species at a time.

How does a food web differ from a food chain in terms of energy flow?

• A food web shows multiple pathways for energy flow, while a food chain shows only one.

• A food web shows only producers, while a food chain shows all organisms.

• A food web does not show energy flow at all.

• A food web shows only decomposers.

Which organisms are found at Trophic Level 1 in a food chain/web?

• Plants

• Snakes

• Hawks

• Rabbits

What trophic level does the shark primarily occupy in the food web?

• Producer

• Primary consumer

• Secondary consumer

• Tertiary consumer