| A | B |
|---|
| environment | the living and non-living things that surround living things |
| ecosystem | all the iving and non-living things in an environment |
| population | a group of organisms of the same kind living in the same place |
| community | all of the populations that live in an ecosystem at the same time |
| habitat | the place in an ecosystem where a population lives |
| desert | very dry ecosystems |
| grassland | dry, often flat areas of land that are hot in the summer and cold in the winter |
| forest | an ecosystem where many trees grow |
| adaptation | any trait that helps an animal survive |
| instinct | a behavior an animal knows without being taught |
| hibernate | go into a sleepless state for the winter |
| migrate | to travel from one place to another and then back again |
| camouflage | a way animals' shapes, colors, or patterns hide them from predators |
| mimicry | imitating the look if another animal |
| resource | materials people and animals use to meet their needs |
| ecosystems' resources | food, water, oxygen, and space |
| Parts of an ecosystem | populations, communities and habitats |
| Types of ecosystems | desert, grassland, saltwater, freshwater,and forest |
| physical adaptations | mimicry and camouflage |
| behavioral adaptations | migration and hibernation |
