11-4 What are food chains and food webs?
Aim: What are food chains and food webs?
OBJECTIVE: Explain and construct food chains and webs to show how organisms are related by
how they get their food.
Key Terms
food chain: way of showing how the energy from food moves from one organism to another
food web: way of showing how food chains are related
Lesson Summary
• Every organism is linked to another in a food chain.
• A producer is always the first link of a food chain.
• The amount of available energy decreases along a food chain.
• Food webs show how a number of food chains are related.
• Many organisms are a food source to more than one organism.
OBJECTIVE: Explain and construct food chains and webs to show how organisms are related by
how they get their food.
Key Terms
food chain: way of showing how the energy from food moves from one organism to another
food web: way of showing how food chains are related
Lesson Summary
• Every organism is linked to another in a food chain.
• A producer is always the first link of a food chain.
• The amount of available energy decreases along a food chain.
• Food webs show how a number of food chains are related.
• Many organisms are a food source to more than one organism.