Science 9/20/10

Bell Question: What and how much is in each compound?

1.  H2SO4           Hydrogen 2

                           Sulfur 1

                           Oxygen 4 

2.  Na Cl            Sodium

                          Chlorine

3.  K Br             Potassium

                          Bromine

4.  Ca CO3       Calcium

                          Carbon

                         Oxygen 3

If you had a block of wood and the density was 1.12, what would I have to do to change the density? 

-You would have to change to block of wood's mass to change the density.

Physical Change- change the appearence

Chemical Change- change the chemical make up