Across
- 1. The part of Earth's surface that is not covered by water, as opposed to the sea or the air
- 3. The sum of all living matter on Earth
- 6. The portion of the system of Earth that includes Earth's interior, rocks and minerals, landforms, and the processes that shape Earth's surface
- 9. A single, self-contained, living thing
- 11. A large, slow-moving, long-lasting accumulation of snow and ice that develops on land
- 13. Areas where standing water covers the soil or where the ground is very wet
- 16. Actions by one thing that have an effect on a different or separate thing
- 17. Sand or small pieces of rock broken down by weathering and deposited on land or at the bottom of a body of water
- 18. All the plants found in a particular area
- 19. All the interacting populations in a particular area
Down
- 2. The science and business of cultivating soil, growing crops, and raising livestock
- 4. A small body of fresh water that flows into a river
- 5. All the water on Earth's surface
- 7. The space, conditions, and all the living and nonliving things around an organism
- 8. Something valuable that we can use
- 10. All living and nonliving things and all their interactions in an area
- 12. The layer of gas surrounding planet Earth that is held in place by gravity
- 14. A large body of water that is still and surrounded by land
- 15. A feature on the surface of Earth such as a mountain, hill, dune, ocean, or river
- 20. The entire body of salt water that covers about 71% of Earth