Thursday Sept. 16 2010

Today in class, we learned about the differences between physical and chemical changes. We learned that for it to be a physical change, the change should not affect the chemical compostition and that the same chemicals and arrangement of atoms would be present. As for a chemical change, the change alters chemical composition where as new chemicals form, the bonds would be broken and formed and the atoms would be rearranged.

A few examples of this would be:

• Snow turning into water - Physical Change
  
• Grilling a steak - Chemical Change
  
• Persperation evaporating - Physical Change
  
• Phosphorous burning - Chemical Change

We also did a lab by going around each table and observing the changes at each station. There, we had to decide whether or not the change was physical or chemical by our observations.

Just A Reminder:

• Quiz on Monday (There will be some review questions. Ex: Density)


• Review on Tuesday


• Lab Test on Wednesday


• TEST on Thursday