Classification of Organisms in Food Chains

S3U4L3 - What is a food chain?

Part 2

Classify Exercise

Multiple Choice

Sort the living thing by what it eats.

• Herbivores

• Omnivores

• Carnivores

• Decomposers

Multiple Choice

Sort the living thing by what it eats.

• Herbivores

• Omnivores

• Carnivores

• Decomposers

Multiple Choice

Sort the living thing by what it eats.

• Herbivores

• Omnivores

• Carnivores

• Decomposers

Multiple Choice

Sort the living thing by what it eats.

• Herbivores

• Omnivores

• Carnivores

• Decomposers

EXTEND AND REFLECT

What kind of teeth do carnivores need to eat other consumers?

Carnivores need sharp teeth to cut through meat.

What kind of teeth do herbivores need to eat plants?

• Herbivores do not need sharp teeth to eat plants, but would have flat teeth to eat plants.

Why is it important to properly dispose of waste and dead organisms?

• Dead organisms and animal waste are food for bacteria. Bacteria can make people sick, so limiting the amount of bacteria helps keep people healthy.

Food Chain

EXTEND AND REFLECT

What provides the energy at the base of any food chain?

• The sun provides energy to the producers at the base of a food chain.

DEVELOP SCIENCE VOCABULARY

What is at the end of a food chain?

• Top predators are at the end of a food chain.

Humans are at the top of the food chain.

SYNTHESIS

How does energy from the sun get to a hawk?

• Energy from the sun is used by plants, like grass, to make food.

• A rabbit eats the grass, and then a hawk eats the rabbit.

How energy moves

EVALUATE

Which type of consumer has to eat the most to get the energy it needs?

• The top predator has to eat the most to get the energy it needs.

Which organism in a food chain gets the greatest amount of energy when it eats?

• A first-level consumer gets the greatest amount of energy from the producer it eats.

Extend and Reflect:

What would happen to a food chain if there were fewer producers?

• There would be fewer first-level consumers and much fewer second-level and third-level consumers in the habitat.

Label the pictures

Multiple Choice

A bird eats a caterpillar. The caterpillar ate leaves. Is this a food chain?

• Yes

• No

A bird eats a caterpillar. The caterpillar ate leaves. Is this a food chain?

• Yes, it is. The leaves are the producer.

• The caterpillar is the first-level consumer, and the bird is the second-level consumer.

WHY IT MATTERS

What would happen to a food chain if there were fewer third-level consumers?

• The second-level consumers’ population would get larger and could get too large for the environment.

• There would also be fewer first-level consumers because many would be eaten.

• Third-level consumers keep the food chain balanced.

What would happen to a food chain if there were more third-level consumers?

• The second-level consumers’ population would get smaller.

• There could be too few second-level consumers, causing the third-level consumers to die or move to another habitat.

• 
  

End of Part 2

To be continued