| A | B |
| classify | to sort into groups |
| Kingdom | the largest classification group |
| Phylum | the level below kingdom |
| class | the third classification level |
| species | the smallest classification group |
| invertebrates | animals WITHOUT an internal skeleton or back bone |
| vertebrates | animals with a backbone |
| fish | cold blooded, scales, gills, live in water, lay eggs |
| amphibians | cold blooded, moist skin, gill & lungs, frogs, toads |
| reptiles | coldblooded, scales, lungs, lay eggs, snakes, turtles |
| birds | warmblooded, feathers, wings, lay eggs |
| mammals | warm blooded, fur or hair, lungs, produce milk |
| ecosystem | a community of living things interacting with their environment |
| population | a group of one or more living things living in a habitat |
| community | a group of living things located in one place |
| niche | the part a living thing plays in its community |
| habitat | the place where a living thing normally lives |
| life cycle | the series of stages a living thing goes through as it grows |
| herbivores | a plant-eating animal |
| carnivore | a meat-eating animal |
| omnivore | an animal that eats both plants and meat |
| decomposer | a living thing that feeds on dead plants and animals |
| competition | two or more living things using the same food and shelter in the environment |
| larva | young worm-like form of many insects |
| pupa | life cycle stage between pupa and adult, often uses a cocoon |
| trait | a quality that sets one living thing apart from another |
| producers | living things that make their own food |
| consumers | living things that use other living things for food |
| prey | animals that are hunted by other animals for food |
| predator | an animal that hunts other animals for food |
| insects | invertebrate with three body sections and six jointed legs |
| food chain | classifying living things by how food is obtained |
| food web | the interaction of a group of food chains |
| protists | living beings that have traits of plants and animals, include algae, fungi and molds |