Down
1. | A large community of animals and plants, which consists of six major categories - coniferous and deciduous forests, deserts, grasslands, tropical rain forests, and tundras. |
2. | The total number of the same kind of living things that live in a certain place. |
3. | A distinctive area that consists of living and nonliving things that interact among its environment. |
|
|
Across
3. | A type of plant or animal that once lived on Earth, but no longer exists. |
4. | Everything around a living thing, including the climate, water resources, the soil, food supply, other living things, non-living things, and microorganisms. |
5. | Species that are in danger of becoming extinct. |
6. | The remains of an animal that once lived. Scientists use these as evidence to identify organisms that once lived on Earth but that may now be extinct. |
7. | The area where an animal or plant normally lives, such as the desert or the rain forest. |
8. | Earth's entire living environment, including the land, sea, and atmosphere where life can be found. |
|