| A | B |
| biodiversity | The number of different species in an area. This is higher in areas closer to the equater and gets lower as you move into colder areas. |
| class | The level of classification that is lower than phylum but higher than order. Mammalia, reptilia, amphibia, and aves (birds) are examples of these levels in the Animal Kingdom. |
| species | The lowest level of classification. The second word of a scientific name. It is lowercase and italicized. |
| family | The level of classification that is lower than order and higher than genus. |
| genus | The level of classification that is lower than family but higher than species. It is the first word of a scientific name and is always capitalized. |
| order | The level of classification that is below class and above family. |
| phylum | The second largest level of classification. It is right below kingdom. Vertebrates and invertebrates are at this level in the animal kingdom. |
| variation | Differences among individuals of the same species. For example, some of the peppered moths have dark spots and some have light spots. Some of the peanuts had 3 seeds and some had 2 seeds. |
| kingdom | The highest level of classification. There are 6 of them: animalia, plantae, fungi, protista, archaebacteria, and eubacteria. |