Wednesday, September 29, 2010

Changes in Matter

Over the past few weeks, we have been discussing what Matter is. We have also been concentrating on the 3 different forms: solid, liquid, & gas. Today, we observed liquid changing into a gas as we participated in "Blowing up a Balloon".

1. Place 1 tsp of baking soda in a balloon.
2. Place 4 Tbsp of vinegar in an empty water bottle.
3. Stretch the balloon over the mouth of the wter bottle and let the soda fall into the vinegar.

Ask your child:
What happened when the baking soda and vinegar mixed together?


  1. Hi,
    I am a beginning teacher and for my course work I was asked to develop a unit for a 2nd grade on Changes to Matter. I simply don't know where to begin and how broad should be the scope of my unit. Could you give me a couple of advises?

  2. Hi Inna! Unfortunately, I'm just now seeing this post.
    As far as developing a unit, it is best to see the standards that are connected with what students should focus on. For instance, if I were to teach this in a 4th grade setting, I may teach it differently than what I do for 7 & 8 year olds. I'd also look at what they have done (prior knowledge) so I could take them to the next stage.
    Here is what I wouldn't do again: I wouldn't try to melt the crayons in a small oven because this proved to be flamible. I wouldn't use a propaine stove either... Instead, I'd search for a place online and see if I couldn't purchase some shaved crayons. :) That would cut down on prep time and then I could use a heating pad to help melt the crayons.