Across
- 3. Physical environment to which organisms have become adapted and survives in
- 7. When CO2 and other greenhouse gases trap heat that would otherwise escape Earth's atmosphere, the planet's temperature rises
- 11. All the animals, plants, and other things in the world that are not made by people, and all the events and processes that are not caused by people
- 12. An organism is the only living thing that consists of one or more cells
- 15. All the inhabitants of a given country or area considered together
- 16. Arange of people with various racial, ethnic, socioeconomic, and cultural backgrounds and various lifestyles, experience, and interests
- 18. A long-term change in the average weather patterns that have come to define Earth's local, regional and global climates
- 19. Tiny life forms, often consisting of a single cell
Down
- 1. The introduction of harmful materials into the environment
- 2. A large group of single-cell microorganisms
- 4. The quality and state of the environment
- 5. One or more communities and their nonliving environment
- 6. Consists of populations of different species that live in the same area and interact together
- 8. A source of supply or support
- 9. A living organism that eats other organisms or organic matter
- 10. The dying out or extermination of a species
- 13. A group of organisms that share most characteristics and can breed with one another
- 14. The planet we live on
- 17. Any of a class (Insecta) of arthropods (such as bugs or bees) with well-defined head, thorax, and abdomen, only three pairs of legs, and typically one or two pairs of wings
- 20. A young tree, vine, shrub, or herb planted or suitable for planting
