1. Properties of Water

2. Cohesion - attraction between water molecules
(Water drop demo)
- attraction between water molecules
Why? Oxygen = (-) charge Hydrogen = (+) charge
Opposites Attract

3. Surface Tension
-the attraction of water molecules at the surface of a body of water
■ allows water to support objects (not float)
■ ex: water strider sits on surface
Demo: paperclip

4. Adhesion Capillary Action- - attraction between a water molecule and
another molecule of a different substance
ex: water to leaf
(penny demo)
Cohesion/Adhesion in Action
Capillary Action-
-movement of water in a space due to cohesion and adhesion
(paper towel demo)
Review of Water Properties

5. HOW DO THE PROPERTIES OF WATER RELATE TO PLANTS?
Transpiration- loss of water from the leaves of a plant
Purpose- used to remove heat from plant, regulate internal
temperature [like sweating for human]
water movement in plants

6. WHY IS TRANSPIRATION IMPORTANT TO THE ECOSYSTEM?