Ecosystems Pre-Read

What is the primary source of energy for all living organisms on Earth?

• The Sun

• The Moon

• The Earth

• The Ocean

What process do producers use to obtain energy from the Sun?

• Photosynthesis

• Chemosynthesis

• Respiration

• Fermentation

In a food chain, what percentage of energy is transferred from one organism to the next?

• 10%

• 50%

• 25%

• 100%

What is the role of consumers in an ecosystem?

• They obtain energy by eating other organisms

• They make their own food using sunlight

• They decompose dead organisms

• They provide energy to producers

How does a food web differ from a food chain?

• A food web shows multiple overlapping food chains

• A food web shows only one path of energy flow

• A food web contains fewer organisms than a food chain

• A food web does not show energy flow

Why can't a food chain go on forever?

• There wouldn't be enough energy to support infinite top-level consumers

• Producers would run out of sunlight

• Consumers would become producers

• Energy would increase at each level

What is a producer and what is an example?

Carnivores are consumers that only eat other organisms. What is an example of a carnivore?

Herbivores are consumers that only eat plants. What is an example of an herbivore?

Omnivores are organisms that eat producers and other organisms. What is an example of an omnivore?