Food Webs and Energy Transfer

Food Chains and Food Webs Pre Questions

What do you like to eat?

Do you like to eat just one food?

What do animals eat?

Well, animals don't either. They like to eat all different types of plants and animals, depending on whether they are a herbivore, omnivore or carnivore

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What is a Food Chain?

Food Chains

A food chain is a sequence of living things in which each one each feeds on the one below it.

Food Chain

A food chain shows you how one organism eats another and transfers its energy. For example, a zebra eats grass, and the zebra is eaten by the lion. The food chain looks like this:

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What is a Food Web?

Food Web

A food web is model made of intersecting food chains.

Food Web

Food webs look at how multiple food chains interact with each other.

Food Web

shows how diverse and interconnected an ecosystem's food sources can be

Food Web

Food webs exist in a variety of biomes. Because each habitat is unique, each food web is slightly different

Food Web

The plants are eaten by grasshoppers and squirrels. The grasshopper is eaten by the lizard, which is then eaten by the fox. The squirrel can be eaten by a fox or a golden eagle. The squirrel can also be eaten by a snake, which is then eaten by the fox. When the fox or eagle die, they are decomposed by earthworms and bacteria.

Food Web

For example, a red fox likes to eat rabbits and birds. A thrush, which is a type of bird, like to eat both worms and snails

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Where does the energy in almost all food come from?

All energy comes from the Sun.

Energy in almost all food can be traced back to the sun. Plants use light energy to produce their food through photosynthesis. Plants are then eaten by animals. Those animals are then eaten by other animals.

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What is a decomposer?

Decomposers

A decomposer is organism that eats dead and decaying matter. Common decomposers include bacteria, fungi, worms and beetles. A decomposer is organism that eats dead and decaying matter. Common decomposers include bacteria, fungi, worms and beetles.

What is it called when animals eat more than one type of food?

Match

Match the following words to their vocabulary definition

• Herbivore

• Carnivore

• Omnivore

An animal that only eats plants

A plant/animal that only eats animals

A plant/animal that eats both plants and animals.

• An animal that only eats plants

• A plant/animal that only eats animals

• A plant/animal that eats both plants and animals.

Match

Match the following words to their vocabulary definition

• Consumer

• Producer

• Decomposer

An creature that can only eat other things to survive

A creature that can make its own food using only the sunlight and water

A creature that breaks down other dead materials to survive

• An creature that can only eat other things to survive

• A creature that can make its own food using only the sunlight and water

• A creature that breaks down other dead materials to survive

Multiple Choice

A food web shows

• how diverse and interconnected an ecosystem's food sources can be

• how one organism eats another and transfers its energy.

• How a plant makes it's own food to transfer energy to the animals

Multiple Choice

A fox can eat more than one animal?

• True

• False

Open Ended

What is the difference between a food chain and food web?