Energy Flow in Ecosystems

What is the main source of energy for ecosystems?

• Geothermal energy

• Wind energy

• Solar energy

• Nuclear energy

What is the role of producers in a food chain?

• They are tertiary consumers.

• They decompose dead matter.

• They convert solar energy into organic molecules.

• They consume primary consumers.

What is a food web?

• A network of interconnected food chains

• A type of plant

• A single line of energy flow

• A group of herbivores

What is the 10% law?

• 10% of energy is lost at each trophic level.

• 10% of energy is transferred to the next trophic level.

• 10% of sunlight is used by plants.

• 10% of organisms survive at each level.

Why are there usually only four or five trophic levels in a food chain?

• Because there is not enough energy to support more levels.

• Because the sun provides energy directly to all levels.

• Because energy is unlimited.

• Because organisms stop eating after the fifth level.