Almost all energy on Earth comes from the sun. Energy Flow Almost all energy on Earth comes from the sun.

Sun Main energy source Photosynthesis

Bacteria Producers Sunlight or Chemical Autotrophs Algae Plants

Photosynthesis Light energy into carbohydrates Produces O2

Chemosynthesis Use energy in chemical bonds to produce carbs Found – no light present

Consumers Acquire energy from others by eating AKA:Heterotrophs

Six Types of Consumer Carnivore Herbivore Omnivore

Six Types of Consumer Scavenger Decomposer Detritivore Detritus

Energy Relationships

Environment producers consumers  decomposers. Food Chains One-way energy flow Environment producers consumers  decomposers.

Food Chains Series of steps in which organisms transfer energy from eating or being eaten Arrows point towards consumer

Food Web Network of complex interactions formed by feeding relationships among the various organisms in an ecosystem

Video on food web