1. List 3 unique properties of water and explain each: Water is polar. Water is the universal solvent. Water is the only substance to exist in all 3 states all the time.

2. What is the chemical formula for water? H2O

Hydrogen Hydrogen Positive positive oxygen - negative 3. Label the water molecule below: hydrogen, oxygen, negative, and positive Hydrogen Hydrogen Positive positive oxygen - negative

Vocabulary: surface tension, water, adhesion, cohesion, hydrogen & oxygen, condensation 4. The two elements that make up water. 5. The act of water molecules sticking together. 6. The Universal Solvent 7. The act of water sticking to other substances. 8. The act of cohesion forming a “skin” on the surface of water. 9. The process of water vapor turning into a liquid 4. hydrogen and oxygen 5. cohesion 6. water 7. adhesion 8. surface tension 9. condensation

Why does water dissolve many substances? Water is polar so it attracts many substances causing them to dissolve.

11. Name 2 reasons ice floats. Its molecules are farther apart. It is less dense.

Or by cooling it – condensation/freezing 12. How can you change the density of water (change it from a solid, to liquid, to a gas)? You can change the density of water either by heating it – evaporation Or by cooling it – condensation/freezing

13. Why is water considered polar? Water is polar because it has a positive and negative end which causes it to attract other substances.

14. What happens to the molecules of water when water freezes? Slow down Form a crystal pattern Less dense. floats

Label the pictures of water molecules as solid, liquid, or gas.