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The Food Chain. How do animals depend on each other?. Organisms are categorized into three groups based on their relationships with other organisms. Predator Prey Decomposers. Click on the pictures to learn about each category. Predator. These creature hunt other animals for food.

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the food chain

The Food Chain

How do animals depend on each other?

organisms are categorized into three groups based on their relationships with other organisms
Organisms are categorized into three groups based on their relationships with other organisms.
  • Predator
  • Prey
  • Decomposers

Click on the pictures to learn about each category.

predator
Predator
  • These creature hunt other animals for food.
  • They have adaptations to help catch food.
  • They help keep

populations of other

animals lower.

Predator

slide4
Prey
  • Prey are hunted by other animals.
  • These animals provide food for others.
  • These animals usually have adaptations to help them escape predators.

Prey

decomposer
Decomposer
  • These organisms consume dead and rotting material.
  • Decomposers play an important role in recycling decaying material.
  • These organisms have special adaptations to break down rotting materials.
predator prey or decomposer
Predator, Prey or Decomposer

Predict which role fits the following descriptions.

1. A mushroom ?

2. A Lion ?

3. A Rabbit ?

4. Has adaptations that help it escape. ?

5. Has adaptations for breaking down food. ?

6. Has adaptations to help it catch animals. ?

food chain
Food Chain

Animals need energy to survive. Animals receive energy by consuming other

animals. A food chain shows the path of energy and is used to describe

the interactions between different animals.

All energy in the food chain comes from the sun.

Secondary

Consumer

Tertiary

Consumer

Primary

Consumer

Producer

the roles of living things
The Roles of Living Things

Living things have different roles that play an important part in

Keeping a balance in nature.

Click on the picture to learn about each role.

Sea Grass

Producer

Primary Consumer

Secondary Consumer

Tertiary Consumer

Small Fish

Sea Lion

Great White Shark

producer
Producer
  • Producers are plants.
  • Plants are called producers because they produce their own food and food for other animals.
  • Plants get their energy from water air and the sun.
primary consumer
Primary Consumer
  • Primary consumers are animals that eat producers.
  • Primary consumers mainly get their energy from plants.
secondary consumer
Secondary Consumer
  • Secondary consumers are animals that eat other animals. Secondary consumers mainly receive their energy from primary consumers.
tertiary consumer
Tertiary Consumer
  • Tertiary consumers are animals that eat both primary and secondary consumers these animals are usually the top animal in the food chain.
create a food chain
Create a Food Chain
  • Draw an accurate food chain using the

animals below.

create a food chain2
Create a Food Chain

Primary

Consumer

Producer

create a food chain3
Create a Food Chain

Primary

Consumer

Producer

Secondary

Consumer

create a food chain4
Create a Food Chain
  • Energy travels from the sun into the Cactus. The Kangaroo rat receives energy from the Cactus fruit. The Rattle Snake Eats the Kangaroo Rat. Finally the hawk receives energy from the snake. The energy from the plant eventually reaches the tertiary consumer.
  • Who would be affected if all the cactus were destroyed?

Tertiary

Consumer

Primary

Consumer

Secondary

Consumer

Producer

parasite host
Parasite/Host
  • Parasites are organisms that live on or inside another organism and feed off their energy.
  • A Host is an organism occupied by a parasite.

The Lamprey is a parasite that hooks on to fish and drinks their blood.

important questions to study
Important Questions to study.
  • Can you describe the characteristics of the following roles of living things-
  • Producers
  • Primary Consumers
  • Secondary Consumers
  • Tertiary Consumers Are you able to describe what scientists use a food chain to describe?
  • Can you identify the source of all energy in the food chain.
food webs

Food Webs

Food Chains are connected to each other.

food chains are very simple and do not tell the whole story of what happens in nature
Food Chains are very simple and do not tell the whole story of what happens in nature.

This food chain is simple and easy to read, but are polar bears the

only animals that eat the seals?

slide22

Food Web

The food web combines multiple food chains to show how different animals interact with each other.

slide23

Food webs show where the energy travels between many different

organisms.

Use the food web to answer these questions.

Which organisms receive energy that begins in the tree?

Which organisms receive energy from the ant?

slide24

Food webs show how organisms are affected by each other.

How do the fox and owl compete against each other?

How would the food web be affected if all of the grass was removed?

slide25

Food webs help scientists determine what would happen to animals

in an ecosystem if another animal was removed.

What would happen to the food web if all the snakes were removed from

the area?

slide26

Energy Pyramid

Secondary/Tertiary Consumer

Primary Consumer

Producer

In a food web energy is captured by the producers and eventually

travels to the top carnivores. As energy is transferred from animal to animal

some is lost. This happens because animals use that energy in their daily

Activities, like hunting, cleaning, pooping. An energy pyramid shows the

amount of energy available at each level of the food chain.

slide27

Which organisms have the most amount of energy in the food pyramid

above?

Which organisms have the least?

animals fall into three categories based on what they eat
Animals fall into three categories based on what they eat.
  • Herbivore
  • Carnivore
  • Omnivore

Click on the pictures to learn about each category.

herbivore
Herbivore
  • These are animals that only eat plants.
  • They have smooth teeth to help chew plants.
  • These animals are often prey animals.
carnivore
Carnivore
  • These animals only eat meat.
  • They have sharp teeth for cutting meat.
  • They are often the predator.
omnivore
Omnivore
  • These animals eat both plants and animals.
  • They have both sharp and smooth teeth for chewing a variety of food.
  • Are sometimes the predator and other times the prey.
carnivore herbivore omnivore
Carnivore, Herbivore, Omnivore
  • Predict which role fits the following descriptions.
  • A Jaguar only eats meat
  • A Chimpanzee eats plants and meat
  • A Wallaby only eats grass.
  • Smooth teeth
  • Sharp and Smooth teeth
  • Sharp teeth