Bellringer/5.1 Notes

5.1

Energy Flow

I. How Organisms Obtain Energy

A. Plants make their own food.

1.1. PhotosynthesisPhotosynthesis-process in which plants make their own food.

a. Plants are also called AutotrophsAutotrophs

2.2. HeterotrophHeterotroph- an organism that must feed on other organisms.

B. Types of heterotrophs:

1.1. CarnivoreCarnivore-eats other animals

2.2. HerbivoreHerbivore-only eats plants

4.4. ScavengerScavenger-eats dead animals

3.3. OmnivoreOmnivore-eats both plants and animals

5.5. DecomposerDecomposer-breaks down and absorbs energy from dead organisms.

1. Energy flow is shown by a food chainfood chain

A. Energy flows through organismsorganisms in an ecosystem.

II. Matter and Energy Flow

2. Energy flows from autotrophs to the heterotrophs and finally to the decomposers

3. Food chains have between 3 to 5 steps

4. Energy is lost during each step of the food chain.

5. Each organism in a food chain represents a Trophic LevelTrophic Level

B. Several food chains connected together make up a Food WebFood Web.

1. Food webs paint a more realistic picture of how energy flows through an ecosystem.

Food Web

1. E.P. get smaller as they get taller because there is less energy available for the next trophic level.

C.C. Ecological PyramidEcological Pyramid-another model used to show how energy flows through an ecosystem.

Classwork:

Section 1 Review, Pg. 123• Questions 1 – 6• Answers Only• Skip Lines Between Each Answer