1. Do Now
We’ve been talking about matter and how reactions take places to construct and break down compounds in living things. Where do you think these reactions take place? What kind of environment is available in a living organism? Be specific.

2. Water, water, everywhere
H2O molecules form H-bonds w/one another
Partially (δ)+H attracted to δ –O
creates a “sticky molecule”
δ = greek delta = partial

3. Elixir of Life Polarity allows for… 1. cohesion & adhesion
surface tension, capillary action
2. universal solvent
many molecules dissolve in H2O
hydrophilic vs. hydrophobic
3. lower density as a solid
ice floats!
4. high heat capacity
water stores heat
heats & cools slowly

4. Adhesion & cohesion

5. Adhesion & cohesion

6. Universal Solvent

7. Density

8. High Heat Capacity
Review 1
Review 2