Today we participated in our local homeschool group’s Second Annual Science Fair.
The fair began with the hostess, A, having all the kids make ice cream in a bag. They used rock salt and ice in a gallon-sized baggie with a smaller bag inside holding the ice cream mix. Then they got to enjoy their ice cream while the presenters went up in front of the group.
S10 did a project on crystal formations using a Borax supersolution. Borax is dissolved in boiling water, which will dissolve a greater quantity of borax than warm or cool water will. As the solution cools, the excess borax precipitates out and you can collect it on a pipe cleaner form. These are the same “crystal kits” that she sold at the Kid’s Marketplace a few weeks ago.
O8 did a slightly more intensive project. She wanted to know how fast her arrows go when they are shot from her bow. We enlisted the help of my BIL, who has access to a high-speed test camera through work. He did some films of her arrow shots and then helped her calculate its speed using the camera’s software.
Other projects included a solar oven:
testing whether gloop (a polymer substance) is a liquid or solid:
a fun and entertaining show by the “science magicians”:
training a cat and the usefulness of mucous (snot):
magnetism and backyard birds:
After the fair, we went to gymnastics and then S10 attended the gym’s practice for Sunday’s Intra Class Competition.