| A | B |
| acid | A solution with a pH lower than 7 |
| Base | A solution with a pH higher than 7 |
| pH | A scale that measures the amount of hydronium ions in a solution. The scale goes from 1-14. |
| Hydrogen Bond | A strong attraction between two atoms or molecules based on their opposite charge |
| Polarity | The idea of one side of an atom being a little bit positive and the other side of the atom being a little bit negative |
| Solution | A mixture of two or more substances that has the same composition all the way through |
| Chemical Formula of Water | H2O |
| Transparent | Clear (you can see through it) "light can pass through it" |
| Odorless | No smell |
| Properties | Characteristic |
| Properties of Water | Ice floats on water, Hydrogen Bonding, It expands when it freezes, High Boiling Point, Transparent, Ordorless, |
| Ion | An electrically charge atom (it is positive or negative) |
| Neutral | A solution with a pH around 7. |
| pH of water | neutral pH=7 |
| Water and Life | Water is needed to :dissolve many substances,, perform biochemical reactions, |