2. COPY DOWN THE FOLLOWING
DEFINITIONS INTO YOUR NOTES
⢠Chemical Change: A change in substances the
have reacted chemically. The original substance is
changed to a new substance and cannot be easily
undone
⢠Physical Change: A change in substance where no
new substance are formed, but it does take on
different characteristics (example: solid becoming a
liquid). Physical changes are reversible, which
means they can be returned to their original state)
3. ⢠Chemical vs Physical Change
⢠Here is a quick video to go over this concept. You
will have to turn the volume up a bit to hear the
narrator
⢠http://www.youtube.com/watch?v=hcunQqbNEM
Q&feature=related
4. ⢠Take a look at the first page of your booklet to get
an idea of how to identify Chemical Changes
5. ⢠Here are some cool reactions. Check them out. Do
you think these are chemical or physical changes?
Lead Nitrate and Potassium Iodide
⢠http://www.youtube.com/watch?v=RE-
dFN7U91M&feature=related
Elephant Toothpaste
⢠http://www.youtube.com/watch?v=ezsur0L0L1c&fe
ature=related
6. ⢠Now please complete the second page of your
booklet. You may do this on your own or with a
partner.
7. ⢠Now think about the Salt Crystals we made. Did you
figure out if this was a chemical change or a
physical change?
⢠Now look at the third page of your booklet. You
need to come up with a way you would make a
bigger and better crystal.
⢠Remember to include all of the variables
(manipulated and constant) as well as a testing
question)
8. ADD THOSE NOTES ON CARBON
DIOXIDE TO YOUR BINDER
Carbon Dioxide
Carbon Dioxide is odourless, tasteless, colourless, and
heavier than air and does not burn. It is used to put
out certain types of fires and also used in carbonated
drinks.
Way to make CO2:
⢠10 ml of yeast + 10ml sugar + 60ml of water
⢠Baking soda + vinegar (often seen in homemade
volcanoes)
