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Across 3. The fluid in which the solid is dissolved 7. What makes water molecules "sticky"? 8. What does not water change easily? 12. A weak acid that dissociates partially, in water 14. What is something that one level of organization can do that the previous level could not 15. What solution allows hydrogen ions combine with bicarbonate ion? 18. Carbon-containing molecules and are central to living systems 19. Water property which allows any organism to be cooled of with sweat 22. Water in its solid form is? 23. A fluid that contains a dissolved solid 24. The pH number 7 means? 25. Property which allows water to expand when frozen

Down 1. Another word for H+ 2. What do bases do to the amount of hydrogen ions? 4. Released when acid dissociates in water 5. Example of an acetic acid 6. The example of this acid is stomach acid 9. Slight positive and negative areas of the molecule 10. When body fluids are kept at a very specific pH it allows it to maintain? 11. What allows the pH within normal limits? 13. Allows animals to walk on water and hang underneath it 16. A symptom that maybe due to the raise or drop of pH 17. When molecules stick to other things 20. Dissociate in water and release hydroxide ions 21. The solid which is dissolved in the fluid