ROANOKE, Va. (WDBJ7) Hannah Weiss from the Science Museum of Western Virginia stopped by to show Caitlin Francis some fun and easy kitchen science experiments to do with the kids if they’ve got a snow day!
She showed us how to make tie-dye milk, and something called “Oobleck,” Watch the video for instructions on those two experiments!
Also, she shared recipes for snow cream, and other fun things to do with every day kitchen items.
3 ingredient Snow Cream
8-12 cups fresh snow
1 can sweetened condensed milk
1 tsp vanilla
1. Gather a large bowl (8-12 cups about) of fresh snow
2. Sprinkle and pour the vanilla and sweetened condensed over the snow
3. Mix until it is all combined
1/3 cup of milk (any kind)
1/3 cup granulated sugar
1 tsp vanilla extract
pinch of salt
~8-12 cups of snow
1. Mix together the milk, vanilla extract, sugar and salt in a bowl and set aside.
2. Gather 8-12 cups of fresh snow.
3. Pour the milk mixture over the snow and mix until it is all combined.
“Fishing for Ice" experiment:
Plate or Dish
1. Put ice down on your plate or dish. You can try one piece or many together.
2. Put the string down on top of the ice and put some salt on top.
3. Wait a few moments (~10 seconds) and try carefully picking up the string. The ice should come with it.
We put salt on roads because it depressing the freezing point of water meaning it makes water freeze at a lower temperature. Normally water freezes at 32 degrees Fahrenheit but when you add salt, water needs to reach a lower temperature to freeze. On our roads this means that when we add salt, it needs to get colder to freeze and make ice. In this experiment it causes the ice near the string to melt making a salt water puddle. However, as the ice melts it dilutes the mixture meaning that there are higher and higher amounts of water in the salt water that has been created. As the amount of water in the salt water goes up, so does the freezing point. Eventually the freezing point will be high enough that the salt water mixture will refreeze and trap the string underneath the ice so that we can pick it up.
Here is an awesome bonus experiment that we did not set up but is really fun to do whenever it is cold outside (snow or no)
Cold weather or freezer
1. Blow the balloon inside your house or a warm space and tie it off so that the balloon stays inflated.
2. Bring the balloon outside (or stick it in your freezer) and watch what happens.
3. Try bringing your balloon back inside (or out of the freezer) and see what happens.
When you bring your balloon outside after blowing it up inside, it should begin to deflate and when you bring it back inside it should begin to inflate. It does this due to something called Charles' Law which is a physical and chemical concept stating that the temperature and volume of a gas are directly proportional. What this really means is that the volume or amount of gas (in our balloon, air) inside a space is related to its temperature and if one changes so will the other. In our balloons, when we blow them up inside a warm space the volume or amount of space they take up is tied or related to the warm space. When we move outside or put our balloon in the freezer, the temperature changes: it drops. Because the temperature changes, the volume or amount of space the balloon takes up should change too and so we should see the balloon deflate. When we go back inside or remove our balloon from the freezer, the opposite is true and the balloon should inflate again.
For more information, or to learn more about the Science Museum, visit their website at http://smwv.org/ .