Energy Sources and Ecosystem Roles

The video explains how energy from the sun is transferred to organisms, starting with autotrophs like plants that use photosynthesis to produce glucose. It contrasts autotrophs with heterotrophs, which obtain energy by consuming other organisms, and further classifies heterotrophs into herbivores, carnivores, and omnivores. The role of decomposers, such as bacteria and fungi, in recycling nutrients in ecosystems is also discussed. The video concludes with a message on the importance of kindness.

What is the original source of energy for your body?

• The sun

• The moon

• The stars

• The earth

What is an autotroph?

• An organism that decomposes dead matter

• An organism that produces its own food

• An organism that consumes other organisms

• An organism that only eats plants

Which process do plants use to produce glucose?

• Respiration

• Fermentation

• Oxidation

• Photosynthesis

What do giant tube worms use to produce sugar, sulfur, and water?

• Nitrogen

• Glucose

• Hydrogen sulfide, carbon dioxide, and oxygen

• Sunlight

What is another name for autotrophs?

• Consumers

• Herbivores

• Decomposers

• Producers

What is a heterotroph?

• An organism that only eats plants

• An organism that produces its own food

• An organism that consumes other organisms

• An organism that decomposes dead matter

Which of the following is an example of a carnivore?

• Human

• Bear

• Lion

• Cow

What do decomposers do in an ecosystem?

• Only eat plants

• Recycle nutrients back into the ecosystem

• Consume other organisms

• Produce their own food

Which of the following is a detrivore?

• Human

• Bacteria

• Fungi

• Worm

What is a saprotroph?

• An organism that feeds by absorbing dead organic matter

• An organism that consumes other organisms

• An organism that produces its own food

• An organism that only eats plants