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Unit 4 Lesson 2 What Are Food Chains
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Unit 4 Lesson 2 What Are Food Chains?
Food Chains
Copyright © Houghton Mifflin Harcourt Publishing Company
• We are fed by the sun !!
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Unit 4 Lesson 2 What Are Food Chains?
Food Chains
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Food Chains
Copyright © Houghton Mifflin Harcourt Publishing Company
• A food chain is the transfer of food energy in a sequence of living things.
• In a diagram of a food chain, arrows show how energy moves.
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Unit 4 Lesson 2 What Are Food Chains?
Food ChainsProducers
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Food Chains
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Food Chains
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
You are what you eat
Copyright © Houghton Mifflin Harcourt Publishing Company
ConsumersEat other living things.
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
• Consumers can be grouped according to the types of food they eat.
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
• Consumers can be grouped according to the types of food they eat.
• A consumer that eats only plants is an herbivore. A zebra is an herbivore. It eats grasses and other plants.
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
• A consumer that eats other animals is a carnivore. A lion is a carnivore.
• A consumer that eats both plants and animals is an omnivore. People are omnivores.
• A consumer that eats dead plants and animals is a scavenger. A vulture is a scavenger.
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
• Are these animals herbivores, carnivores, omnivores, or scavengers?
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Unit 4 Lesson 2 What Are Food Chains?
You Are What You Eat
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Hunt or Be Hunted
Copyright © Houghton Mifflin Harcourt Publishing Company
• Consumers can also be grouped by whether they hunt or are hunted.
• A predator is an animal that hunts other animals. A lion is a predator.
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Unit 4 Lesson 2 What Are Food Chains?
Hunt or Be Hunted
Copyright © Houghton Mifflin Harcourt Publishing Company
• An animal that is eaten is called prey. Deer and elk are prey for wolves in the Rocky Mountains.
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Unit 4 Lesson 2 What Are Food Chains?
Hunt or Be Hunted
Copyright © Houghton Mifflin Harcourt Publishing Company
• An animal can be both a predator and prey. For example, a frog might eat insects; however, a snake might eat the frog.
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Unit 4 Lesson 2 What Are Food Chains?
Food Chains
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Food Webs
Copyright © Houghton Mifflin Harcourt Publishing Company
• Many living things eat more than one type of food.
• A food web shows the relationship among different food chains.
• Food web models use arrows to show who eats what.
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Unit 4 Lesson 2 What Are Food Chains?
Food Webs
Copyright © Houghton Mifflin Harcourt Publishing Company
• Make a food chain with these desert organisms.
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Unit 4 Lesson 2 What Are Food Chains?
Food Webs
Copyright © Houghton Mifflin Harcourt Publishing Company
• Make a food chain with these desert organisms.
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Unit 4 Lesson 2 What Are Food Chains?
Changes in Food Webs
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Changes in Food Webs
Copyright © Houghton Mifflin Harcourt Publishing Company
• Changes in food webs can affect all parts of a food web.
• If a living thing disappears from a food web, all living things that depend on it are affected.
• If a living thing is too numerous, resources such as food, water, and living space become limited.
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Unit 4 Lesson 2 What Are Food Chains?
Changes in Food Webs (In very cold weather)
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Changes in Food Webs
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 4 Lesson 2 What Are Food Chains?
Changes in Food Webs
Copyright © Houghton Mifflin Harcourt Publishing Company