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Across 2. transfer of energy due to a temperature difference 3. Hydrogen is slightly ______________ charged in a water molecule 7. during the winter time, the top of a pond freezes forming an __________________ 9. ice (2 Words) 11. This causes the bonds of water molecules to "stick" to each other 14. Water is ___________________ for life on Earth 15. Ice contains air thus Ice is less ________ than water 16. Oxygen is slightly _____________ charged in a water molecule 19. Between 4 Celsius and 0 Celsius water does this 21. This causes the bonds of water molecules to "stick" to other things 23. Sometimes water can act as an __________ 24. the process of changing from a solid to a gas without being a liquid 28. Between 4 Celsius and 0 Celsius water forms these 29. H2O 30. Water freezes at __________ degrees

Down 1. The slight charges of Hydrogen and Oxygen are why water is 2. Water is made with two parts 4. During a phase change, the __________________ of water does not change 5. bonds that hold water molecules together 6. Ice melts at _________ degrees 8. ____________ Allows bugs and other things to float on water (2 Words) 10. Since Water cannot be found on the periodic table water is a 12. generally, pure water is ____________ 13. Since ice is less dense than water ice does this on water 17. Four is the _______________ number of bonds a single water molecule can have 18. Water boils at _________________ degrees Celsius (2 Words) 20. the pH of pure water is ___________ 22. Heat transfers between objects because everything in nature desires to be 25. Water is made of one part of this element 26. Other times, water can act as a __________ 27. water in the gas form