Ch. 3 Lesson 2How Does Energy

Flow in Ecosystems?

sunlight•main energy source for life on Earth

producers

• organisms that make their own food

• examples: plants, algae

consumers•organisms that cannot make their own food

consumer

consumer

producer

herbivore•consumer that eats only plants

carnivore•consumer that eats only animals

omnivore•consumer that eats both plants & animals

scavenger•consumer that eats dead plants & animals

decomposers• digest waste & remains of dead plants & animals

• examples: bacteria, fungi & insects

food chain• Always begins with sunlight

• Transfers energy (nutrients & minerals) in 1 direction by eating & being eaten

food web

• system of overlapping food chains

• flow of energy branches in many directions

Identify the:

1. Producers 2. Primary Consumers 3. Secondary Consumers 4. Herbivores 5. Carnivores 6. Omnivores 7. What elements are missing from this food web?

Construct a Food web using the following animals:

• SNAKE,  CORN , CATERPILLAR, DEER, CROW, MOUSE, COUGAR, SQUIRREL, MICROORGANISMS (decomposers)

Draw pictures and label each organism. Draw arrows between

them.  

What do decomposers do?

DAY Bread 1

(Location)

Bread 2

(Location)

Bread 3

(Location)

1

2

3

4

5

6

7

Prediction: I predict that the _____ bread will have more mold.

herbivore•consumer that eats only plants

food web• System of overlapping food

chains

• Flow of energy branches in many directions

scavenger•Consumer that eats dead plants & animals

sunlight•main energy source for life on Earth

omnivore•consumer that eats both plants

& animals

carnivore•consumer that eats only animals

producers•organisms that make their own food

decomposer•Digests waste & remains of dead plants & animals

sunlight•Food chains

always begin with _______

food chain• Transfers energy (nutrients & minerals) in 1 direction by eating & being eaten