Mystery crystals

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This week we were continuing our mystery crystals experiments. We were still trying to discover what the mystery crystal was. One of our experiments was to dissolve the crystals in water, pour out the water, and saw the remains of the crystals. The uno nown was really kosher salt. Then we started matter. An example of a chemical change is when you mix baking soda and vinegar. An example of a physical change is when you peel a banana. When you mix baking soda and vinegar, the atoms rearrange themselves to make something new. When you peel a banana, the atoms do not rearrange themselves and do not make anything new. 



S&EP: SP3: Planning and carrying out investigations
We asked ourselves, well, if baking soda makes a chemical reaction, then baking powder must do the same thing! We did the experiment and it worked! But not in the same way. The powder fizzed, but not in the same way that the soda did.