Science FA CCC Energy Flow Diagram

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What percentage of the energy of sunlight that falls on the leaves of green plants is converted into food energy?

10%

1% (correct)

25%

5%

Why do food chains generally consist of only three or four steps?

Because producers are not present beyond the fourth trophic level.

Because more energy is available at higher trophic levels.

Because each trophic level retains most of the energy it receives.

Because each trophic level loses a large amount of energy as heat to the environment. (correct)

What is the average percentage of food eaten by primary consumers that is turned into their own body and made available for the next level of consumers?

10% (correct)

5%

20%

15%

Why are there generally a greater number of individuals at the lower trophic levels of an ecosystem?

Because producers form the greatest number in an ecosystem. Signup and view all the answers

Why are food chains often represented as a series of branching lines known as a food web?

To depict the multiple connections among different organisms in an ecosystem. Signup and view all the answers

Why does very little usable energy remain after four trophic levels in a food chain?

Because a significant amount of energy is lost at each step in the food chain. Signup and view all the answers

What is the main characteristic of the flow of energy in ecosystems according to the text?

It is unidirectional. Signup and view all the answers

What happens to the energy available at each trophic level as it progresses through the food chain?

It gets diminished progressively. Signup and view all the answers

How do harmful chemicals enter our bodies through the food chain?

Indirectly, by being absorbed by plants from soil or water bodies. Signup and view all the answers

What role do autotrophs play in the energy flow diagram in ecosystems?

They capture and convert solar energy into food energy. Signup and view all the answers

How do pesticides and chemicals used in agriculture affect ecosystems?

They can lead to pollution by contaminating soil and water. Signup and view all the answers

What happens to the energy after passing through various trophic levels?

It becomes unavailable to the previous level. Signup and view all the answers

What is the role of autotrophs in a food chain?

Producers Signup and view all the answers

Where do herbivores typically belong in a food chain?

Second trophic level Signup and view all the answers

What happens to the energy in a food chain as it moves from autotrophs to heterotrophs?

It decreases Signup and view all the answers

Which trophic level do larger carnivores belong to in a food chain?

Third trophic level Signup and view all the answers

What is the term for a series of organisms feeding on one another in an ecosystem?

Food chain Signup and view all the answers

What is the main source of energy for activities in the living world?

Solar energy Signup and view all the answers