Across
- 4. living things
- 7. water that is safe for humans to drink
- 8. area of land that drains into one main main lake or river
- 9. water containing a high concentration of calcium and magnesium
- 12. eroded rock fragments and soil carried by water or wind
- 14. highest point of land on a continent; rivers flow into different oceans depending on which side of the divide they start
- 15. technique for separating solutions that involves boiling and condensation
- 16. a biological community of interacting organisms and their physical environment
- 18. observe, check, or keep track of something for a specific purpose
- 19. amount of dissolved salts in water
Down
- 1. large moving body of ice that can be many meters or even kilometers thick
- 2. average weather measured over a long period of time
- 3. measure of the amount of substances besides water in a water sample; description of how pure a water sample is
- 5. characteristics used to describe a stream or river; these include volume and rate of flow, slope and shape of bed
- 6. movement of water through a membrane from an area of lower water concentration to one of higher water concentration; technique used for purifying water
- 10. physical characteristics or behaviour of a species’ chances of survival in a particular environment
- 11. group of organisms of the same species that live in a particular area
- 13. stream of water that moves within a larger body of water
- 15. description of the variety of different species in an ecosystem; may also be used to describe variety in a population or species
- 17. daily change in water level of the oceans