Water in the spa

2. The attraction between unlike molecules (8)
3. Type of water that has had carbon dioxide added to it (9)
4. Forces that oppose the motion of a solid object through a fluid (4)
8. Who came up with the principle of relative density? (10)
11. Movement created by an object moving through water (10)
12. Any classification of drug that increases urination by inhibiting the anti-diuretic hormone (9)
14. Also known as dissolution (9)
17. The vaporization of water followed by the condensation to remove salts and other chemicals (12)
18. Household water softeners pass the water through what? (5)
19. A hardness ion (9)
20. Type of hard water that cannot be removed by boiling (9)

1. The opposite of acidic (8)
3. Created by the principles of cohesion and adhesion on the top of water (7,7)
5. The downwards force on an object. Works in combination with other forces to allow us to have balance in water (7)
6. When immersed in water this pressure will be equal on all sides (11)
7. The change of a substance from its vapor state to a liquid state (12)
9. The upward force on an object when fully or partially immersed (8)
10. The amount of water vapor in the air (8)
13. Attraction between like molecules that act to unite them (8)
15. Refers to liquids mixing in all proportions forming a homogeneous solution (11)
16. Water flow is what before it strikes an obstacle of opposing force (7)
21. Reverse direction swirling created by higher speeds (6)