Food Chains Unit Map   Food Chains Unit Guide  

Every living thing is part of an ecosystem. More Food chains, food webs, and energy pyramids can be helpful tools for understanding how the living things in an ecosystem depend on each other for the energy they need to perform daily activities. This unit helps students explore the roles that organisms play within an ecosystem, whether as producers, consumers, or decomposers. This unit explains the importance of predator-prey relationships and the differences among herbivores, carnivores, and omnivores. Students will learn about relationships among species as they compete for resources in order to survive. Finally, the unit explores ways that ecosystems can be threatened due to changes.