1. 1-2 The Properties of Water
Part 1
Pages 23-24

2. Properties of Water (page 23)
Supplies needed per group: cup of water, cup of oil, 2 strips of paper towel, wax paper, timer, metric ruler, ***pipette***
Notice that you are measuring in millimeters (mm) for # 3.
For #6… looking at the SIDE of the drop.
Please place supplies back on the counter when you are done.
Send a rep up with your oil and water numbers (mm).

3. Oil vs. Water (in mm)
Oil
Water

4. The Structure of Water All matter is made up of atoms.
An element is a substance made up of only one kind of atom.
Examples:
Au – Gold
Cu – Copper
C - Carbon

5. Atoms attach together (or bond) to form molecules.
Two hydrogen atoms bonded to an oxygen atom form a water molecule.
Chemical formula (or shortened way to write it) for water is H2O.

6. Polar Molecule
A molecule that has electrically charged areas is a polar molecule.
Water is a polar substance.
Oxygen end has a slight negative charge while the hydrogen ends have a slight positive charge.

7. Water’s unique properties…
The positive hydrogen ends of one water molecule attract the negative oxygen ends of nearby water molecules. As a result, the water molecules tend to stick together.

8. Water Molecule Model
Create your own water molecule using the toothpicks and marshmallows.
Draw, color, AND label your water molecule.