Across
- 6. a salt or ester of nitric acid
- 8. a salt or ester of phosphoric acid
- 9. the first stage of the chain
- 11. the process of settling or being deposited as a sediment
- 14. a body of permeable rock that can contain or transmit groundwater
- 15. the sticking together of particles of the same substance
- 17. when people compete
- 18. an area or ridge of land that separates waters into rivers
Down
- 1. dissolved calcium and magnesium
- 2. the variety of life in the world or in a particular habitat
- 3. physical things
- 4. The process of a liquid slowly passing through a filter
- 5. Does not allow water or liquid to pass through it
- 7. living things
- 9. acidic or alkaline
- 10. Of, found in or produced by the sea
- 12. the study of the oceans physical and biological.
- 13. cloudiness or haziness of a fluid
- 16. a system of interlocking and interdependent food chains
- 19. the sticking together of different substances