Energy Flow

Daily Science Workout

Think of all the things that make up a
pond in the countryside. List all the parts of the pond’s ecosystem in your interactive notebook.
Then draw an illustration of a pond ecosystem. Are all the
parts of the ecosystem living? Explain
your answer. (You do not have to write
the question.)

Objectives

Describe the functions of producers, consumers, and
decomposers in an ecosystem.

 Distinguish between a food chain and a food web.

Explain how energy flows through a food web.

Describe how the removal of one species affects the
entire food web.

Organisms can be

divided into 3 groups based on how they get
energy:

1. Producers (plants)
2. Consumers (eaters)
3. Decomposers
(breaks down dead
organisms)

Producers make food by

using photosynthesis.

Multiple Select

Which of the following are herbivores

• cows

• grasshoppers

• rabbits

• lions

Multiple Choice

An omnivore eats

• meat

• plants

• produce their own food

• meat and plants

Multiple Choice

Which of the following would NOT be classified as a carnivore

• lion

• tiger

• bear

• grasshopper

Open Ended

How are all organisms classified?

Multiple Select

Which of the following are producers?

• flowers

• trees

• cats

• fungi

Multiple Choice

Plants make their own food through a process called

• transpiration

• photosynthesis

• cross pollination

• krebs cycle

Multiple Choice

Organisms are broken down into how many groups based on how they get energy

• 4

• 2

• 3

Scavengers

• A special type of

omnivore that only
eats dead plants and
animals.

• Example:
Hyena and
vulture

Fill in the Blanks

__________________ and ________________________________ are decomposers

Open Ended

Explain how decomposers are different from other consumers.

Food Chains and Food Webs

• Food chain-a diagram

that shows how energy
flows from one organism
to another.

• Food web-a diagram that

shows the feeding
relationships between
organisms.

• NOTE: In nature, food

chains are very rare.
Food webs happen
much more often!

The direction of the arrows in food chains and webs

Point in the direction of the flow of energy
example grass----> rabbit----> hawk

Using the following create a food chain

squirrel hawk nuts

Food web

​using the following create a food web: deer, grass rabbit hawk fox mountain lion mouse

Quiz Time

• What are the 3 types of organisms?
• Producers, consumers, and decomposers
• What are the three and ½ types of consumers?
• Herbivores Carnivores and Omnivores (scavengers)
• What is a process that producers do to convert sunlight into

energy?

• Photosynthesis
• A diagram that show the feeding relationships between

organisms is a …

• Food web

• What do decomposers do when animals are dead?
• Break down dead organisms
• What do producers need to stay alive?
• Sunlight, carbon dioxide, and water
• When I say producer, you say…
• Plant
• A diagram that shows how energy moves from one

organism to another is…

• Food chain

Energy Pyramid-shows how

energy moves through a

food chain.