Home Course prep Strolling Water Rainbow Science Experiment

Strolling Water Rainbow Science Experiment

Strolling Water Rainbow Science Experiment


Let’s make a strolling water rainbow! There’s no higher approach for little scientists to find out about capillary motion and coloration mixing than by making water stroll (sure – stroll!) on this colourful rainbow science experiment. This science experiment is a favourite of ours as a result of it’s really easy to arrange and the outcomes are virtually speedy.

Take a look at the straightforward step-by-step under after which grab 30 extra jaw-dropping (however simple prep!) science experiments children will love from our store!

Walking Water Rainbow Science Experiment


Getting Prepared

To prep, I gathered our provides:

  • 6 wide-mouth glasses or jars
  • Paper towels (use the type the place you possibly can choose a measurement)
  • Meals dye or liquid water colours (pink, yellow, and blue)

I grabbed the six small glasses first.  We’ve had success utilizing wide-mouth ingesting cups and canning jars, too.  Regardless that all of them labored, simply keep in mind that larger glasses will want extra meals coloring.

Walking Water Rainbow Science Experiment

I ripped off six sheets of paper towel and folded every sheet in thirds, lengthwise.

We had been utilizing fairly small glasses, so I lower a couple of inches off the folded paper towel so it would slot in the glasses.

It’s a good suggestion to take a look at your paper towel strip to ensure they match correctly in your glasses.  They need to be capable of go from the underside of 1 jar to the following with out sticking up within the air an excessive amount of. The paper towel on the left reveals the just-right peak.  It’s vital to arrange this rainbow science experiment for achievement!

Walking Water Rainbow Science Experiment


Making a Rainbow

This colourful rainbow science experiment is so easy and fast, it’s excellent for even the youngest little scientists.  My 3 12 months previous, Q, couldn’t wait to get began.

First, I had him line up the glasses and fill the primary one with a good squirt of pink watercolor, the third with yellow, and the fifth glass with blue.  We left the opposite glasses empty.

Walking Water Rainbow Science Experiment

Subsequent, I helped Q add water to the glasses with coloration till the coloured water virtually reached the highest.

We moved the glasses right into a circle and added the paper towels.  Beginning with the pink, we added one finish of the paper towel after which put the opposite finish within the empty glass subsequent to it.

We continued round till the final paper towel was positioned into the pink glass.

Walking Water Rainbow Science Experiment

We noticed the colour wick up the paper towel immediately.  This rainbow science experiment doesn’t take lengthy to get going!

Cool science for kids! Make a magic water rainbow. My kids will love this!

After one other a number of minutes, the coloured water had virtually travelled the entire size of every paper towel.

Awesome science experiment for kids! Make a walking water rainbow.

5 minutes later, the water had traveled all the way in which up after which down the paper towel and was dripping into the empty glass.

The yellow and pink water dripped into the empty cup to make orange!  It made for an excellent lesson on coloration mixing.

Cool science for kids! Make a walking water rainbow.

After one other 5 minutes, we may see the water stage had dropped within the pink, yellow, and blue glasses and rose within the as soon as empty glasses because the water continued to journey from the extra full glasses to the much less full glasses.

Super cool science for kids! Make a walking water rainbow.

We grabbed a snack and watched our lovely rainbow science experiment through the subsequent 20 minutes. The water continued to stroll from the first coloured glasses to fill the secondary-colored glasses till all of the jars had been stuffed equally.

What an awesome science project for kids! Make a walking water rainbow with just a few simple supplies.

Not Working?

If you happen to aren’t seeing a lot motion inside a couple of minutes, it could be that you want to add extra water to your coloured water glasses.  It actually must be virtually on the prime for the water to stroll shortly.  So attempt topping off these glasses and seeing if that will get issues transferring.

If you happen to see the water transferring up the paper towel however it looks as if it’s taking perpetually, it could be the kind of paper towel you might be utilizing.  You desire a paper towel that may actually maintain a variety of water.  We now have used Bounty Choose-a-Dimension and Goal’s Up and Up Model Choose-a-Dimension with success.

It truly is price the additional effort of making an attempt totally different cups and paper towels to get this exercise to work.  And upon getting had success, don’t throw out these beautifully-colored paper towels or the coloured water!  We gently squeezed out our paper towels and allow them to dry in a heap on a baking sheet.  We ended up with attractive tie-dyed wanting paper towels to make use of for crafts and we used the leftover water as watercolors for portray with later.

I love the colors in this cool science activity! Make a walking water rainbow.


The Science Behind It

This rainbow science experiment is as magic because the science behind it.  The coloured water travels up the paper towel by a course of known as capillary motion. Capillary motion is the power of a liquid to move upward, in opposition to gravity, in slender areas.  This is identical factor that helps water climb from a plant’s roots to the leaves within the tree tops.

Paper towels, and all paper merchandise, are produced from fibers present in crops known as cellulose.  On this demonstration, the water flowed upwards by means of the tiny gaps between the cellulose fibers.  The gaps within the towel acted like capillary tubes, pulling the water upwards.

The water is ready to defy gravity because it travels upward because of the enticing forces between the water and the cellulose fibers.

Cool science experiment for kids! Make a walking water rainbow.

The water molecules are inclined to cling to the cellulose fibers within the paper towel.  That is known as adhesion.

The water molecules are additionally attracted to one another and stick shut collectively, a course of known as cohesion.  So, because the water slowly strikes up the tiny gaps within the paper towel fibers, the cohesive forces assist to attract extra water upwards.

Sooner or later, the adhesive forces between the water and cellulose and the cohesive forces between the water molecules might be overcome by the gravitational forces on the load of the water within the paper towel.  

When that occurs, the water is not going to journey up the paper towel anymore. That’s the reason it helps to shorten the size that coloured water has to journey by ensuring your paper towel isn’t too tall and ensuring you fill your coloured liquid to the highest of the glass.

Rainbow Science Exercise Extensions

Flip this demonstration into a real experiment by various the water stage (quantity) you begin with and seeing how lengthy it takes the water to succeed in the empty glass.

Or begin with the identical quantity of coloured water and change the model, kind (single vs double ply, quilted vs not) or size of paper towel to see how lengthy it takes for the water to “stroll” to the empty glass.

You can even use the identical quantity of water, identical size and model of paper towel however range the peak of the stuffed glass, by elevating them up on books, to see how that impacts the pace of the water because it “walks” to the empty glass.

Have you ever had sufficient enjoyable with the paper towels?  Strive utilizing different paper merchandise to see how the kind of paper results the outcomes.  Strive rest room paper, printer paper, newspaper or a web page from a shiny journal.  What do you are expecting will occur?

Seize a Document Sheet

Assist children maintain monitor of their outcomes by grabbing our free document sheet! Then seize 30 extra jaw-dropping (however simple prep!) science experiments children will love from our store!


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