Walking Water Science Experiment

This experiment is simple to set up and only requires items that you probably already have in your kitchen.

A big THANK YOU to my son’s second grade teacher who gave him a science kit to do over the summer. This was one of the experiments in the kit.

You can also try the Color Changing Walking Water Experiment with two filled with different colored water with paper towel feeding into the empty third glass.

Enjoy!

Watch the Walking Water Science Experiment

Walking Water Science Experiment

Supplies Needed for the the Walking Water Science Experiment

• Two glasses of equal height
• Water
• Food Coloring (optional)
• Paper Towel

Walking Water Science Experiment Instruction

Step 1 – Position your two empty glasses about 2 inches apart. Pour water into one of the glasses until it is halfway full

Step 2 – Add a few drops of food coloring into the water.

Tip: Using food coloring is optional, but it will help you see the water “walking” more clearly

Step 3 – Stir the food coloring until the water is all one color.

Step 4 – Grab a strip of paper towel that is about 1 to 2 inches wide.

Tip: I used one section of paper towel and folded it in half until it was the correct width.

Step 5 – Place one end of the paper towel into the glass with the water. Then place the other end into the glass that is empty. Then leave the glasses sit and come back to check on them in about an hour.

Step 6 – Return to the glasses and observe what has happened.

Tip: The longer you wait to check on the glasses will result in more of the water moving over to the other glass. The water will stop moving over until the cups are both filled with the same amount of water.

How Does the Walking Water Science Experiment Work

The water appears to defy gravity, but it in reality it moves because of a process called capillary action. The adhesive forces between the water and the paper towel are stronger than the cohesive forces inside the water. As a result, the water travels up and across the paper towel out of one glass and into another.

For even more fun, check out the Color Changing Walking Water Experiment.

I hope you enjoyed the experiment.  Here’s some printable instructions!

Walking Water Science Experiment

Print

Materials

• Two glasses of equal height
• Water
• Food Coloring (optional)
• Paper Towel

Instructions

1. Position your two empty glasses about 2 inches apart. Pour water into one of the glasses until it is halfway full
2. Add a few drops of food coloring into the water.
3. Stir the food coloring until the water is all one color.
4. Grab a strip of paper towel that is about 1 to 2 inches wide. I used one section of paper towel and folded it in half until it was the correct width.
5. Place one end of the paper towel into the glass with the water. Then place the other end into the glass that is empty. Then leave the glasses sit and come back to check on them in about an hour.
6. Return to the glasses and observe what has happened. The longer you wait to check on the glasses will result in more of the water moving over to the other glass. The water will stop moving over until the cups are both filled with the same amount of water.