Bell Ringer You have 5 minutes to write

Bell Ringer You have 5 minutes to write your answer down in your notebook. Where does energy for life processes come from?

3. 2 Notes ENERGY FLOW

Source: Sunlight is the main energy source for life on earth Other sources: - energy stored in inorganic chemical compounds

Energy from the Sun Photosynthesis Autotrophs use light energy to power chemical reactions Convert carbon dioxide and water into oxygen and carbohydrates (sugars & starches)

Photosynthesis adds oxygen, removes carbon dioxide

Autotrophs vs Heterotrophs: 1) Autotrophs Can produce own food (producers) Capture energy from sunlight or chemicals to produce food Example: Plants, some algae 2) Heterotrophs Cannot produce own food (consumers) Get energy and food supply from other organisms Example: Animals, fungi Herbivores, carnivores, omnivores, detritivores, decomposers

Energy Flows through an ecosystem in one direction Sun --> autotrophs --> to various heterotrophs Food Chain series of steps in which organisms transfer energy by eating and being eaten

3. 2 Review Fill out Heterotrophs table

Heterotrophs (consumers) Herbivores Eat plants Deer, cows Carnivores Eat meat Wolves, dogs Omnivores Both plants and animals Humans, bears Detritivores Plant & animal dead remains Mites, earthworms Decomposers Breaks down organic matter Bacteria, fungi