Energy transfer in trophic levels

What do you think it means by "making organic molecules"?

How do chemosynthetic bacteria make organic molecules?

• hydrothermal vents

• the sun

What is the primary source of energy for most producers?

• Chemicals from hydrothermal vents

• Organic molecules

• The sun

• Other foods

How do consumers obtain energy?

• By capturing energy from the sun.

• By making their own organic molecules.

• By eating other organisms or food sources.

• By breaking down dead organisms.

Why are decomposers written on the side of the diagram?

What do the arrows in a food chain and food web show?

What is the main difference between a food chain and a food web?

• A food chain is a single pathway of feeding relationships, while a food web consists of interrelated food chains.

• A food web is a simplified representation, while a food chain is a better representation of reality.

• A food chain shows energy transfer, while a food web shows only feeding relationships.

• A food chain includes decomposers, while a food web does not.

Approximately how much energy is transferred from one trophic level to the next in an ecosystem?

• 1%

• 10%

• 50%

• 90%

10% of the energy is moved from one trophic level to the next. What happens to a majority of the other energy?

• lost to the wolves

• lost to the animal

• lost to heat transfer

• took a walk