Today we finished off the notes for chapter 7 lesson 4. We looked at pp. 258-260. We did a quick review of how to balance chemical equations after a chemical reaction. Here is a video to explain balancing equations. We then looked at the three ways a chemical reaction could be sped up or slowed down. We then started the chemical reaction lab. Here we are comparing the how heat affects chemical reactions and we also looked at how surface area affects chemical reactions.