The real question: Why would water flow upward?
•Shallow metal or borosilicate glass pie pan
•Small glass jar
1. With the help of an adult, place the pie pan onto the burner of a stove.
2. Pour about an inch of water into the pie pan and stir in 2 drops of food coloring.
3. Place the glass jar upside-down into the water in the pie pan, making sure the jar is stable.
4. Heat the water to near boiling on the stove and then turn off the burner.
5. Allow the water, pan, and glass jar to cool.
The Real Chemistry Behind How and Why: Air is a mixture of gases, mostly nitrogen and oxygen. When you heat the water, some of the water molecules leave the liquid state and become a gas. Like all gases, water, oxygen, and nitrogen take up more space (volume) when hot. When we heated the water, we filled the glass jar with lots of gas molecules. As the water and gases cooled, they occupied less space, and some of the water condensed back to the liquid state. This created a vacuum that was filled by the water.
STEAM Connection: During the experiment, you are examining the volume of space that gas occupies. This is a math term, but mathematics is critical to understanding our scientific observations.
Now Try This!: Time how long it takes for the water to reach its highest level.
Full STEAM ahead!―21st-century chemistry for kids
Chemistry for kids can be so much fun! Real Chemistry Experiments has 40 exciting and engaging experiments with a real-life STEAM (Science, Technology, Engineering, Art, Math) connection for kids.
Become a better problem-solver, inventor, and innovator with these fascinating chemistry experiments. Each one has a clear purpose or question that’s being asked, step-by-step instructions, a list of materials you’ll need, questions to help you record your observations, and more. By the time you’re through, you’ll have chemistry for kids down to a science!
This book of chemistry for kids includes:
Imagine all the things you can learn, create, and discover in this colorful book about chemistry for kids―the sky’s the limit!
EDWARD ZOVINKA, PhD is a college professor with a PhD in chemistry from the University of California, Davis. For over 25 years, he has directed the Rural Outreach Chemistry for Kids (R.O.C.K.) program that reaches more than 5,000 K-12 students annually.