Flow of Energy - PowerPoint Presentation

Slide1

Flow of EnergySlide2

Source of Energy

Raise your hand if you included this on your schoolyard diagram.

The Sun provides the light and heat energy for most forms of life on Earth.

Sun = SolSlide3

Producers

Producers chemically change solar (light ) energy in the chlorophyll (the green color in the plant) into

their food.

Plants are producers

.Slide4

Food

Plants make this food for their own use. They need the energy to survive and thrive.Plants store the food in many places: roots, stems, leaves, and fruits.

Plants make food during the process called photosynthesis.Slide5

Photosynthesis

To undergo photosynthesis, plants need:SunlightWater

Carbon dioxide

Carbon DioxideSlide6

Plants Use their food

Plants use food to grow.Plants use stored energy (food) when the resources they need to grow and thrive are unavailable.

Plants use food to survive harsh environmental conditions, such as drought or cold winters.Slide7

Consumers

Consumers are organisms that get their energy by eating either producers (plants) or other consumers (animals).They use this energy to survive, grow, and reproduce .Slide8

Flow of energy

Let’s look at some of the diagrams you completed in your science notebook on the first day of this lesson.

What do they have in common?Slide9

Food Chains

When energy is transferred through organisms it is called a food chain. Arrows are used to show the

direction the energy is flowing.In the schoolyard, you might see:

Remember, nearly every food chain starts with energy from the Sun.Slide10

Example

Use the strips of paper to create a food chain for organisms that live in one of the Earth’s ecosystems. It might be the Arctic or the ocean, forest or desert, or grassland

or jungle.Cut six strips of paper of different sizes, as shown here.Color the widest strip yellow. This will represent the Sun.Slide11

Example

Write the name of a plant on the second widest strip of paper. On the third widest paper, write the name of an organism that eats the plant.

On the fourth widest strip, write the name of an animal that eats the organism on the second strip. On the fifth and sixth strips, continue the sequence. If you are unable to think of any organisms, name another plant, or a second animal, that may eat one of the organisms listed.

Carnivore

Carnivore

Plant

Carnivore

HerbivoreSlide12

Food Chain

Link your food chain together beginning with the Sun. Add the producer and then the consumers (herbivores and carnivores). Use tape to secure the link.

Sun

Producer

Consumer:

Herbivore

Consumer:

Carnivore

Consumer:

CarnivoreSlide13

Comparing food chains

Work in groups of four to compare the food chains that were created.What do the food chains have in common with each other?

Could any food chains overlap with each other?

Flounder

Porpoise

Plankton

Small Mullet

ShrimpSlide14

Food Webs

When food chains overlap, a food web is formed.Use the chains in your group to form a food web.Draw the food web in your science notebook.

Flounder

Porpoise

Plankton

Small Mullet

Shrimp

Trout

Sea Gull

CrabSlide15

Decomposers

Decomposers are organisms such as fungi, bacteria, and animals that play a major role in breaking down dead matter and returning nutrients to the soil. They also play a role in the nitrogen cycle.Slide16

decomposers

Add some decomposers to your food web.

Flounder

Porpoise

Plankton

Small Mullet

Shrimp

Trout

Sea Gull

Crab

Bacteria

MoldSlide17

The most important role

The most important role an organism (producer, consumer, or decomposer) plays in the ecosystem is ______ because ______.Slide18

Compare Roles in the Ecosystem