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Crossword Quiz

  
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Your score will be reduced for every hint that you get.
Click on a number in the grid to see the clue or clues for that number.
You have 20 minutes. Good luck!
    1     2    3       4   
           5      
6    7               
8             9      
               
 10                
               
11       12          13    
               
14           15        
               
     16            
               
               
    17             

Across:

1. Animal that lives under water (4)
8. Added to drinking water to kill bacteria (8)
9. This is formed when soap reacts with hard water (4)
10. First stage of water treatment (9)
11. Water that does not lather easily (4)
12. Another name for the limescale found in kettles (3)
14. This type of ion causes hardness in water (7)
15. A container for water (6)
16. A place where a large quantity of water is stored (9)
17. The top curved surface of water (8)

Down:

2. Water turns anhydrous copper sulfate to this colour (4)
3. This element is one of the constituents of water (8)
4. The voltameter is called after this person (7)
5. These plants extract pure water from seawater (12)
6. This is the solid state of water (3)
7. The chemical breakdown of water (12)
12. This prevents tooth decay (8)
13. & 14 Down. This type of paper is used to test for the presence of water (6, 8)
14. & 13 Down. This type of paper is used to test for the presence of water (6, 8)
15. Ice_____ - this will be found floating at the poles (4)