| Term | Definition |
| environmental science | the study of how humans interact with he environment |
| ecology | is the study of how living things interact each other and their surrounding environment |
| biology | the study of lving organisms |
| hunters-gathers | people who obtain food by collecting plants and by hunting wild animals or scavenging their remains |
| agriculture | is the practive of growing, breeding. and caring forplants and animals that are used for food and other human needs |
| natural resource | any natural material that is used by humans |
| biodiversity | the number and variety of species that live in an area. |
| ecological footprint | shows the productive area of Earth needed to support one person in a particular region |
| sustainability | the condition in which human needs are met in such a way that a human population can survive indefinitely |