Unit Starter Questions
12/13 & 16
1) What happens to a substance in a physical change?
2) What are some examples of evidence for a chemical change?
3) Explain WHY you chose the suspect you did as being "guilty" in the crime scene lab. What evidence did you use to make your selection?
1) What is the one big reason why substances change phase?
2) Are phases changes and example of a chemical change or a physical change?
3) Both fizzing and boiling involve a gas being formed; so why is fizzing a chemical change, but boiling is a physical change?
1) What are the two types of changes matter can do?
2) What evidence do we have that phase changes are physical and not chemical changes?
3) What is the only difference between all the phases of matter?
1) What evidence did the boiling water lab give us to prove that "dissolving" is a physical change (mixture) and NOT a chemical reaction?
2) What important phenomenon occured in the last few minutes of our boiling water lab? How do you explain it?
3) What do the "flat" spots on a phase graph mean? How about the "angles" on a phase graph?
What are the Phases of Matter?
This video is good for a quick visual review of what exactly a "phase" is and how they work.
How to Get to Absolute Zero?
I admit, this one is a bit complicated...when you are trying to get atoms to do things they don't like to do naturally, it takes some very extreme advanced science. But for those of you who are interested and have the mind for it, this will be fascinating.
A couple things though:
1) He does explain the basic process of alcohol distillation...if that annoys you, don't watch this video.
2) When he talks about Helium 3 and Helium 4, he is talking about Isotopes (same elements but with different number of neutrons).
3) If you have questions about the other things he talks about, you can ask me and I will try my best to explain it... cheers!