1. Water
Biology

2. Vocabulary Adhesion Buffer Cohesion Hydrogen bond Neutralize Polar
Capillary action
Surface tension
Solvent
Vocabulary

3. Property #1: Water is Polar
POLARITY –
It has area with a slight positive charge, and an area with a slight negative charge.

4. Polarity
This polarity gives us the property of Hydrogen Bonding.

5. Polarity
Hydrogen Bonding allows one water molecule to “stick” to another water molecule.

6. Cohesion is the ability for water molecules to stick to themselves
Property #2: Cohesion
Cohesion is the ability for water molecules to stick to themselves
Beads of Water

7. Meniscus in a graduated cylinder
Property #3: Adhesion
Adhesion is the ability for water molecules to stick to other materials
Meniscus in a graduated cylinder

8. Property #4: Capillary action
Capillary action is one of the forces that draw water out of the roots of a plant and up into its stems and leaves.
Cohesion holds the column of water together as it rises.

9. Property #5: Surface tension
Water has the ability to support small objects.
The hydrogen bonds between neighboring molecules cause a film to develop at the surface.

10. Property #6: A Great Solvent
Remember…
A solvent has the ability to dissolve other materials
Water is a solvent for many things
For example: The liquid part of your blood is 95% water
Some items, such as fats and oils DO NOT dissolve in water.