Unit 2

1. Unit 2 Energy

2. I. Organisms Obtain and Use Energy • Obtain Energy • What is energy and where does it come from? • Use food to make cells • Calories: measurement of ______________stored in food • Kilocalories: measure by ______________ needed to raise temp. of 1L water 1 degree Celsius. • Food is burned to determine amnt of calories

3. How Organisms get food • Make their own food • Ex: Plants producers or Autotrophs • organism that convert ________ or chemicals into ________ that living cells can use

4. Get food from another source • EX: consumers or Heterotrophs • organism that relies on or __________ another organism for _____________ • Types of Heterotrophs • Herbivore: • Carnivore: • Decomposer:

5. II. Food Chains show how energy moves through the ecosystem. Producer Primary Consumer Secondary Consumer Decomposer

6. Food Chains show how energy moves through the ecosystem. Producer Primary Consumer Secondary Consumer Decomposer Autotroph (makes own food)

7. Food Chains show how energy moves through the ecosystem. Producer Primary Consumer Secondary Consumer Heterotroph Decomposer Heterotroph Heterotroph Autotroph Eats something else

8. Food Chains show how energy moves through the ecosystem. Producer Primary Consumer Secondary Consumer carnivore Heterotroph Decomposer Heterotroph Bacteria & fungus Green plant herbivore Heterotroph Autotroph Eats something else

9. Food Chains show how energy moves through the ecosystem. Producer Make 100%of food Primary Consumer Secondary Consumer carnivore Heterotroph Decomposer Heterotroph 10% 10% 10% Green plant herbivore decomposer Heterotroph Autotroph Eats something else

10. Food Chains show how energy moves through the ecosystem. Producer Make 100%of food Primary Consumer 10% Secondary Consumer 1% carnivore Heterotroph Decomposer .1% Heterotroph 10% 10% 10% green plant herbivore decomposer Heterotroph Autotroph Eats something else

11. Food Chains show how energy moves through the ecosystem. Producer Make 100%of food 100lbs. Primary Consumer 10% 10lbs. Secondary Consumer 1% 1lbs. carnivore Heterotroph Decomposer .1% .1lbs. Heterotroph heat heat heat heat 10% 10% 10% green plant herbivore decomposer Heterotroph Autotroph Eats something else

12. Energy pyramids show how each trophic level (step in a food chain) is supported by the previous level. 4 .—;; ;;;;;;;; If the ecosystem has very few plants it can not have a lot of predators.