An ecosystem consists of a community of living things interacting with each other and the environment.
Most ecosystems derive their energy directly or indirectly from the sun.
Food chains and food webs represent the feeding patterns of the members of an ecosystem. Pass out the name cards to the students. Give the sun the ball of yarn. Review with them that the sun is the source of all energy on the earth. The sun holds on to the end of the yarn and tosses the ball of yarn to a student wearing the name of the plant.