Food Chains and

Food Webs

Next

Objectives Students will be able to define a food chain

and food webStudents will construct a food chain and food

web by placing producers primary consumers, secondary consumers, and top predators in the correct order.

Identify and define the role of organisms within a food chain.

Students will explore how humans disrupt natural food chains.

NextPrevious slide

Discussion Questions:• What is a food chain?•What is a food web?•How are humans apart of the food chain?•How do humans damage food chains and food webs?

NextPrevious slide

Table of Contents:Section 1: Energy Section 2: Consumers

Section 3: Food Chains and Food

Webs

Living things need foodHow do we get

energy?How do animals get energy?

How do animals get energy?

Where do plants get their energy?

Summary of section 1Review Quiz: 1

Herbivores

Carnivores

Omnivores

Summary of Section 2

Review quiz: 2

Food Chains

Food Webs Human

InterferenceSummary of section 3

Review Quiz: 3 NextPrevious slide

What did we learn today?

Final Quiz

Why do living things need food?Why do living things need food?•People, plants, and animals are all living things.• All living things need air, water, sunlight, and food to stay alive.

NextPrevious slide

How do we get this energy?•Food contains nutrients that give living things energy. Living things need energy to grow, move, and stay healthy.• Not all living things get their food the same way. Each living thing finds food in its habitat, the environment in which it lives.

NextPrevious slide

Where do animals get their energy? Where do animals get their energy? • Animals and people cannot make their own food. They are consumers, because they must consume, or eat, other living things to energy. • Consumers are divided into more groups, such as herbivores, carnivores, and omnivores.

Consumers:Carnivores

Herbivores

Omnivores

NextPrevious slide

Where do plants get their Where do plants get their energy?energy?

• Plants get their energy from the sun. Plants are producers. A plant produces its own food through photosynthesis.Photosynthesis:•During photosynthesis, sunlight is used to combine (mix) water (H2o) and carbon dioxide (CO2)to make food. •The food that plants make is called glucose. Glucose is a type of sugar.

Interesting Fact:Plants do not use all the food; they store some of it away.

NextPrevious slide

Summary of Section 1: Summary of Section 1: •In section one we learned that all living things need food and energy to survive. People get energy from nutrients in foods. Animals (consumers) get their food by eating other living things. Plants (producers) get their food by photosynthesis. Photosynthesis is when sunlight combines with water and carbon dioxide to make glucose (sugar).

You will now take a short review quiz on section 1.

NextPrevious slide

1)A plant is a ___________

a)Producer

b) Consumer

NextPrevious slide

Section 1 Review Quiz:Section 1 Review Quiz:

2) A plant produces its own food through _____________

a) Photosynthesis

b) Food Web

Next

3) Animals are ________.

a) Producers

b) consumers

Next

Herbivores :Herbivores :• Herbivores are animals that eat plants. •Many animals eat grass, flowering plants, and other parts of trees, such as fruit, roots, and bark.•There are two types of herbivores:

Grazers: Animals that eat grass and small plants near the ground.

(can either be a grazer or a browser) Browsers: Animals that eat leaves, shoots, and twigs.

NextPrevious slide

Carnivores:•are animals that eat other animals. •Carnivores are predators. Predators hunt other animals for food. The animals they hunt for are called prey.

When predators eat herbivores, they are secondary consumers. •When they eat other carnivores, they are tertiary consumers. Large Carnivores Medium Carnivores

Small Carnivores

NextPrevious slide

Omnivores:Omnivores eat both plants and other animals. Most omnivores have no trouble finding food,

because they are not picky eaters.Interesting Fact:People are also omnivores. We eat different foods

to get all the nutrients that our bodies need. ‘

NextPrevious slide

Summary of Section 2:In section two we learned that consumers are divided into three

groups:Herbivores: are animals that eat plants. • 2types of herbivores

Grazers: Animals that eat grass and small plants near the ground.

Browsers: Animals that eat leaves, shoots, and twigs. Carnivores (predators): hunt other animals for foodTwo types of Carnivores: Secondary Consumers: predators who eat herbivores Tertiary consumers: predators who eat other animalsOmnivores: eat both plants and other animals.• Humans are also omnivores.

You will now take a short review quiz for section2

NextPrevious slide

1) Is this animal a herbivore, carnivore, or omnivore?

a) Herbivore

b) Omnivore

c)Carnivore

NextPrevious slide

Section 2 Review QuizSection 2 Review Quiz

2) Which animal is a herbivore?

a) Cow b) Lion

Next

Food Chains:A food chain shows how living things rely on each other for food.

It also shows how energy is moved from one living thing to another. Each food chain starts with the sun. The sun gives energy to plants.

NextPrevious slide

Fox5) Tertiary Consumers: Large carnivores (Lion, Tigers, crocodiles)

Owl4) Secondary consumers: (animals that get their energy from plant eating animals.)

Grass Hopper3) Primary Consumers: Herbivores (first living thing that must eat to get energy)

Grass2)  Food chain starts with plants being the producers.

Sun 1)Energy: The sun gives plants energy

Food Webs:Food Webs:A food web is a group of connected chains.

When an animal from one chain is eaten by an animal from another food chain, those animals are part of a food web.

NextPrevious slide

Human Food Web:People are the top predators of a food chain.

When we eat different foods we become part of a food web.

NextPrevious slide

Human Interference:•The population of people on Earth increases every year. We forget that both people and animals need to eat.•People damage food chains and webs when they change nature by:

Cutting down forests to build farms or homes - destroys the homes and food supplies of animalsUsing chemicals called pesticides on their lawns or on farms. -They kill bees butterflies, and insects that plants need to grow.Hunting Carnivores - Killing carnivores throws food chains and webs off balance. This will increase the population of other animals.

NextPrevious slide

Summary of section 3

NextPrevious slide

Food Chain:1.Food chain starts with plants being the producers2.Primary Consumers: Herbivores(first living thing that must eat to get energy3. Secondary consumers: Carnivores (animals that get their energy from plant eating animals.)4. Tertiary Consumers: Large carnivores(Lion, Tigers, crocodiles)Human Food Web:•When humans eat different foods they become part of a food web.

•People damage food chains and webs when they change nature by: Cutting down forests to build farms or homes

Using chemicals called pesticides on their lawns or on farms. Hunting Carnivores

1) What is the correct food chain order for these living things?

c) Tertiary Consumer b)

Producere)

Secondary consumer

a) Primary Consumer

a)d , c, a, b , e

b)d, b, a, e, c

NextPrevious slide

Section 3 Review QuizSection 3 Review Quiz

d) Energy

2) What is the correct food chain order for these living things?

1

2

3

4

a) 4,2,3,1

b)4,1,3,2

Next

2) What is the correct order of the food chain?

1)Primary Consumers 2) Energy 2) Tertiary consumers 3)producers 4) Secondary Consumers

a)2,4,3,1, 2

b) 2,3, 1,4,2

Next

What did we learn?Vocabulary List:

•Photosynthesis: -During photosynthesis, sunlight is used to combine (mix) water (H2o) and carbon dioxide (CO2) to make food. •Herbivores: are animals that eat plants.Two types of herbivores:

-Grazers: Animals that eat grass and small plants near the ground. -Browsers: Animals that eat leaves, shoots, and twigs.

•Carnivores: are animals that eat other animals. •Omnivores: eat both plants and other animals.•Food Chain: A food chain shows how energy is moved from one living thing to another. •Food Web: A food web is a group of connected chains.Food Chain Order:• 1)producers 2)Primary Consumers 3)Secondary Consumers 4)Tertiary Consumers (plants) ( Herbivores ) (Carnivores) (Large Carnivores)

NextPrevious slide

Final Quiz:Final Quiz:

1) Is this animal a herbivore, carnivore, or omnivore?

a)Carnivore

b) Herbivore

c) Omnivore

NextPrevious slide

2) True or False Plants are consumers?

a) True

b) False

Next

3) True or False – Humans are omnivores?

a) True

b) False

Next

1

2 34

5

4)What is the correct food chain order these living things?

a)3,4,1,2,5

b) 3,5,4,1,2

Next

5) Is this animal a herbivore, carnivore, or omnivore?

a)Carnivore

b)herbivore

c)omnivore

Next

6) Which two organisms in the food web are both secondary and tertiary consumers?

a) Rabbit and Fox

b) Bird and Squirrel

c) Snake and Eagle

Next

Congratulations!!! You have successfully completed this PowerPoint. You now understand how food chains and food webs work.

We will start our human food web project.

• Each student will create their own food web.

Previous slide