Ch. 7 Ocean Unit

6. strong seasonal winds that often bring heavy rain
7. to fill an area again with people or animals
8. a tiny living thing that is so small you need a microscope to see it
10. something made by humans, not found naturally
12. a scientist who studies how living things interact with their environment
15. planting trees or plants again in an area
17. places where fresh water from rivers mixes with salt water from the ocean
18. all the people or animals living in a certain place
19. a person who works to make change, often to help people or the environment

1. a type of tree that grows in salty coastal water and has roots above the ground
2. the edge where land meets the ocean
3. when water, wind, or ice slowly wears away land or rock
4. cutting down large areas of trees
5. shellfish that live in water and can make pearls
8. soft-bodied animals, often with shells, like clams, snails, and octopuses
9. narrow areas of water that go from the ocean into the land
11. the area of land that is covered by water at high tide and uncovered at low tide
13. water that is a mix of fresh water and salt water
14. the amount of salt in water
16. pieces of land surrounded by water on three sides