Matter and Energy in the Environment Chapter 20

Lesson 1: Abiotic Factors Abiotic means nonliving. The abiotic factors would be the nonliving parts of the environment.

Ecosystems Include all of the abiotic (nonliving) factors and Biotic (Living) factors in an area. An ecosystem could be a pond, forest, or field. All organisms need both the abiotic and biotic factors to survive.

Lesson 3: Energy in ecosystems Energy flows through ecosystems from producers to consumers.

How does energy move in ecosystems? Energy moves in a flow pattern. Matter such as water, moves cyclic pattern

Producers are organisms that get energy from sunlight; they make their own food by photosynthesis

Consumers obtain their energy by eating (consuming) other organisms herbivores carnivores omnivores Eat only producers Eat other animals Eat producers and animals

Modeling energy in ecosystems Food chain: shows how energy flows in an ecosystem through feeding relationships.

Modeling energy in ecosystems Food web: shows how food chains in a community are interconnected.

An energy pyramid shows the amount of energy available in each step of a food chain. Energy is lost at each trophic level