| A | B |
|---|
| Using Energy | This step involves green plants such as trees and grasses and some kinds of small living things such as algae |
| Producers | A living thing containing chlorophyll and capable of using sunlight to make its own food from materials taken from the soil and air |
| Receiving Energy | If animals or plants cannot make their own food they receive evergy by eating other organisms |
| Consumer | A living thing that eats other living things |
| Herbivore | An animal that eats only plants or plant materials |
| Carnivore | An animal that eats only other animals |
| Omnivore | An animal that eats both plants and other animals |
| Decomposer | An animal that lives on dead materials, breaking them down and returning the materials to the envirorment |
| Food chain | the erangment of living things in an order in which each uses the next as a source of food |
| Food Web | A combination of all the food chains in an ecosystem |
| Food Pyramid | A diagram to show how the amount of food energy changes at each step of the food chain |
| Energy from the sun | Energy flow begins with the sun |
| limiting factor | A factor that controls the number of living things that an ecosystem can support |
| Carrying Capacity | The maximum number of living things that given ecosystems can support without danger to th survival of the living things |
| Cycle | The movement of resources in an ecosystem that results in materials being used again and again |
