In this week's Weather Academy Wednesday, Meteorologist Kalie Pluchel goes through four different weather experiments with some materials that you may already have lying around the house. Make sure to submit your photos of these experiments below!
Experiment 1: Make a Cloud in a Jar
Optional: Plate to place the jar on
Dye the water with food coloring (easier to see the cloud if you do this step)
Carefully pour hot water into the jar, so it’s a little less than half-way full.
Have the lid to the jar ready to go. Spray a little bit of hairspray and quickly put on the lid
Place a couple of ice cubes on top of the jar
Watch the cloud form!
Clouds form when water vapor rises and condenses on to tiny particles (in this case the hair spray). The warm water in the jar allows it to heat and some of the water is evaporated in the jar causing water vapor. Once that warm air rises to the top of the jar it gets cooler bu the ice cubes. When water vapor cools, it then condenses on the hairspray particles and forms a cloud.
Experiment 2: Learn About Density
Pour enough water into one glass until it is almost full.
Stir is about 6 tablespoons of salt
In the other glass, fill with water until it is nearly full.
Carefully, drop the egg into the glass that has no salt in it. Watch what happens.
Now, drop another egg into the glass that has salt in it. Watch what happens.
This experiment is to learn about density. Notice, the glass that does not have salt in it, the gg just falls to the bottom. This is because the egg is denser than the water. When you add salt, it makes the water denser and in turn, the egg floats at the top.
Experiment 3: Tornado in a Jar
Clear Liquid Soap
Fill the jar with water, 3/4 full
Put a teaspoon of liquid soap and a teaspoon of vinegar in the jar
Tighten the lid and shake until the ingredients mix up
Swirl the jar in a circular motion and you will see a small tornado form
When you swirl the bottle, that forms a vortex and simulates a tornado in the jar.
Experiment 4: Make Your Own Thermometer
Clear, Plastic Bottle
Clear Plastic Drinking Straw
Fill the bottle 1/4 of the way with equal parts water and rubbing alcohol
Add a few drops of food coloring
Place the straw in the bottle without touching the bottom
Seal the bottle with modeling clay so the stay stays put
Holds your hands on the bottle and watch the mixture in the bottle move up into the straw
The mixture that you made in the bottle will expand when it’s warm, just the air in the atmosphere when it's warmer outside. The mixture no longer fits in the bottom of the bottle and must go somewhere. As the picture expands it moves up into the straw.
Submit any photos of these experiments that you did here: