12. Interactions within Ecosystems Quiz

What is the main source of energy for all living things in an ecosystem?

• Water

• Sunlight

• Oxygen

• Soil

In a food chain, what role do green plants play?

• Producers

• Primary consumers

• Secondary consumers

• Decomposers

What happens to the energy stored in the food when an organism respires?

• It disappears

• It becomes water

• It is released for life processes

• It becomes light energy

What is the correct order of energy flow in a typical food chain?

• Consumers → Sun → Producers

• Producers → Consumers → Sun

• Sun → Producers → Consumers

• Sun → Consumers → Producers

What is chemical potential energy?

• Energy stored in sunlight

• Energy stored in oxygen

• Energy stored in food

• Energy stored in water

During photosynthesis, which of the following is NOT needed?

• Carbon dioxide

• Oxygen

• Water

• Light

Which statement best describes respiration in organisms?

• Only plants respire

• Respiration uses light to make food

• Respiration is the breaking down of glucose to release energy

• Respiration is only performed by consumers

What are the products of respiration?

• Water and oxygen

• Glucose and carbon dioxide

• Carbon dioxide and water

• Glucose and energy

In an aquatic food chain, what is a role played by algae?

• Tertiary consumer

• Secondary consumer

• Decomposer

• Producer

Why are food webs more accurate than food chains in showing ecosystem relationships?

• Organisms may be part of more than one food chain

• Food chains are too detailed

• Food webs show energy loss

• Food chains show decomposers more clearly