Presentation on theme: "Chapter 1 Section 3. Energy is vital to all living things Most energy comes directly or indirectly from the sun Because energy is continuously used by."— Presentation transcript:
Energy is vital to all living things Most energy comes directly or indirectly from the sun Because energy is continuously used by living things, it must be continuously replaced in the ecosystem Energy flows through an ecosystem, getting used up as it flows This is different than the water cycle, where water is recycled and not used up
Producer – an organism that captures energy and stores it in food Most energy enters an ecosystem through photosynthesis Plants and other photosynthetic organisms take water and carbon dioxide from their environment and use energy from the Sun to produce sugar.
Consumer – organisms that get their energy by eating other organisms Consumers cannot produce their own food, they consume food Consumers are classified by their position in the feeding relationship Primary Consumer – eat plants Secondary Consumer – eat plant eaters Tertiary Consumer – eat larger plant eaters
Under each word write the following: 1.The definition 2.3 examples 3.Explain where they get their energy from Producer, Consumer, Decomposer
Scientists use two different models to show the feeding relationships that transfer energy from organism to organism in an ecosystem The models are food chains and food webs
Food Chain – describes the feeding relationship between a producer and a single chain of consumers in an ecosystem This is model for simple feeding relationships
Food Web – is a model of the feeding relationships between many different consumers and producers in an ecosystem A food web shows many overlapping and interconnected food chains It is a better model for the complex feeding relationships in an ecosystem