Bellringer5 1 Notes 5 1 Energy Flow I

Bellringer/5. 1 Notes

5. 1 Energy Flow

I. How Organisms Obtain Energy A. Plants make their own food. 1. Photosynthesis-process in which plants Photosynthesis make their own food. a. Plants are also called Autotrophs 2. Heterotroph an organism that must feed on other organisms.

B. Types of heterotrophs: 1. Carnivore-eats other animals Carnivore 2. Herbivore-only eats plants Herbivore

3. Omnivore-eats both plants and animals Omnivore 4. Scavenger-eats dead animals Scavenger

5. Decomposer-breaks down and absorbs Decomposer energy from dead organisms.

II. Matter and Energy Flow A. Energy flows through organisms in an ecosystem. 1. Energy flow is shown by a food chain 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 Level B. Several food chains connected together make up a Food Web 1. Food webs paint a more realistic picture of how energy flows through an ecosystem.

Food Web

C. Ecological Pyramid-another model used to Pyramid show energy flows through an ecosystem. 1. E. P. get smaller as they get taller because there is less energy available for the next trophic level.

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