Katie decided to join us for chemistry today, which was fun. We experimented with salt, first admiring the nice square crystals through the magnifying glass, then dissolving them in water, then putting drops of the salt water on plates and seeing how the crystals looked different when they were allowed to reform slowly vs when we forced them to reform quickly by evaporating the water with a blow dryer. Then we made covalent molecules with marshmallows and toothpicks. We haven't really gotten to covalent molecules yet, and the craft was supposed to be making a salt crystal lattice model. But someone had eaten all the full sized marshmallows that I bought for this activity, and it turned out that mini marshmallows just aren't stable enough to make a large, free-standing model with. Once the mini marshmallows were opened, though, we had to do something with them (or you know they would have been gone when we did want them), so covalent molecules it was. Travis enjoyed building them very much. Katie probably ate as many as she used in her model.
(This is Travis's)
(Katie's was an imaginary molecule, I think.)
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