Energy Flow in Ecosystems

The video explains the flow of energy in a food chain, starting with the sun as the ultimate energy source. Green plants, through photosynthesis, convert solar energy into chemical energy, which is then transferred to herbivores and subsequently to carnivores. At each trophic level, some energy is used for metabolic activities, while the rest is lost as heat. Decomposers also play a role in energy transfer. The video emphasizes that energy cannot be created or destroyed, only transformed, and highlights the continuous flow of energy through trophic levels.

What is the primary source of energy for all living beings in a food chain?

• The Moon

• The Sun

• The Ocean

• The Wind

Which process allows green plants to convert solar energy into chemical energy?

• Photosynthesis

• Respiration

• Fermentation

• Digestion

What substances are combined during photosynthesis to form carbohydrates?

• Carbon Dioxide and Water

• Oxygen and Nitrogen

• Hydrogen and Oxygen

• Nitrogen and Water

What percentage of sunlight energy do green plants capture in a terrestrial ecosystem?

• 10%

• 1%

• 25%

• 50%

What happens to the energy that is not utilized by herbivores?

• It is converted into water

• It is released as heat

• It is stored as fat

• It is used for photosynthesis

How do carnivores obtain energy in a food chain?

• By eating plants

• By decomposing organic matter

• By consuming herbivores

• By absorbing sunlight

What is the term for the heat energy released into the environment by organisms?

• Community heat

• Thermal energy

• Solar heat

• Metabolic heat

What role do decomposers play in the energy flow of an ecosystem?

• They produce energy

• They store energy

• They consume energy

• They recycle energy

Which principle states that energy cannot be created or destroyed in an ecosystem?

• Law of Conservation of Energy

• Law of Thermodynamics

• Law of Energy Transfer

• Law of Conservation of Mass

In a food chain, how is energy transferred from one trophic level to the next?

• Through chemical energy in food

• Through direct sunlight

• Through water absorption

• Through air circulation