Science Activities Spring St. Patricks Day Summer

Rainbow in a Jar with Sugar – Density Science Experiment

Did you know you can effectively demonstrate density with just food coloring, sugar, and water! Don’t believe me? This¬†rainbow in a jar with sugar allows you to show kids how the more dense a liquid (colored for visual purposes only), the heavier it is and it will sink. This¬†rainbow density jar is quick, easy, and cheap to try. Use this rainbow in a jar experiment with sugar as a rainbow activity for kids in the spring or as part of a science lesson on¬†density for kids. No matter how you use it, this¬†density experiment¬†makes an impressive¬†density tower¬†that will impress preschool, pre-k, kindergarten, first grade, 2nd grade, and 3rd graders too.

Did you know you can effectively demonstrate density with just food coloring, sugar, and water! Don't believe me? This rainbow in a jar with sugar allows you to show kids how the more dense a liquid (colored for visual purposes only), the heavier it is and it will sink. This rainbow density jar is quick, easy, and cheap to try. Use this rainbow in a jar experiment with sugar as a rainbow activity for kids in the spring or as part of a science lesson on density for kids. No matter how you use it, this density experiment makes an impressive density tower that will impress preschool, pre-k, kindergarten, first grade, 2nd grade, and 3rd graders too.

Rainbow in a Jar with Sugar

Teach your students about density with this fun, easy density tower experiment. In this rainbow in a jar activity you will change the density of water by adding sugar. Color the water with food coloring so preschoolers, kindergartners, grade 1, grade 2, and grade 3 students can see the layers of this beautiful rainbow density jar. Whether you are a parent, teacher, or homeschooler Рyou will love this simple rainbown in a jar expierment with sugar.

Density for Kids

Rainbow Density Jar

This simple density jar experiment only requires a few simple ingredients:

  • water
  • sugar
  • food coloring
  • pipette or science syringe (handy for laytering)
  • heat source (warm water absorbs sugar better)
  • tall narrow glass container for layering

Rainbow Experiment

Rainbow in a Jar Experiment with Sugar

While this is a super simple density experiment for kids, it does require you to follow the directly exactly or you will just have sweet, colored water.

Combine the following each in a seperate cup:

  • no sugar, & red food coloring
  • 1 Tablespoon sugar¬† & yellow food coloring
  • 2 Tablespoons sugar & green food coloring
  • 3 Tablespoons sugar & blue food coloring

Note: You only need a few drops of food coloring per cup.

Density Science Experiment

Now add 3 ounces HOT  water per container and stir until the sugar has dissolved.

Density Tower

Density Experiment

Now it’s time to make the rainbow density tower out of sugar water. Make sure you layer the liquids¬†slowly. Start by pouring the blue water in your layering container. It has the most sugar and therefore is the most dense – it will settle at the bottom of the rainbow.

Density Experiment

Density Tower

For the next color you will want to use a syringe or pipette to not stir the layers, but instead stack them to make a pretty rainbow. Carefully and slowly add the green sugar water to the container.  I suggest running the water down the inside of the glass. As the green water is added you will notice that it does not mix with the blue water but rather sits on top of it!

Rainbow in a Jar Experiment with Sugar

Density Science Experiment

Now slowly begin adding the yellow water to the container using the same methodology with the pipette, going SLOWLY and runnig it down the side of the conater.

rainbow activities for kids

Rainbow Experiment

Once all of the yellow water is added repeat this process with the red water. The red water has no sugar in it (fewer molecules mixed in the water) so it is the least dense. Unless you stir, it wil sit on the top of the other, denser colors of sugar water.

Did you know you can effectively demonstrate density with just food coloring, sugar, and water! Don't believe me? This rainbow in a jar with sugar allows you to show kids how the more dense a liquid (colored for visual purposes only), the heavier it is and it will sink. This rainbow density jar is quick, easy, and cheap to try. Use this rainbow in a jar experiment with sugar as a rainbow activity for kids in the spring or as part of a science lesson on density for kids. No matter how you use it, this density experiment makes an impressive density tower that will impress preschool, pre-k, kindergarten, first grade, 2nd grade, and 3rd graders too.

Density for Kids

So what is density anyway. Density helps us predict if something will sink or float. The more dense an object is, the more the molecules are packed together making it heaviest for it’s size.

Extension Activity: Look up swimming in the Great Salt Lake in Utah or Dead Sea in Israel. These bodies of water are even saltier than ocean water.

  • So would they be more or less dense than the Atlantic Ocean?
  • Is the Pacific Ocean more or less dense than a lake or swimming pool?

Now see if your parent can help you google swimming in the Great Salt Lake or the Dead Sea. Peopl float on the top of the water. The fluid is dense people are pushed to the top. That’s because the water is denser than pool water, due to the high salt concentration.

rainbow-slime-st patricks day spring rainbow suncatcher craft for st patricks day and spring grow rainbow crystals for st patricks day

Rainbow Activities for Kids

Looking for more fun rainbow activity ideas? Check these out!

lemon volcano experiment for kids mentos and soda experiment Kids will be excited to learn and explore when making this ice cream volcano! This is a combination of an ice cream activity and easy volcano experiments for one EPIC, memorable summer activity for kids! Try this summer experiment as part of your ice cream theme with toddler, preschool, pre-k, kindergarten, first grade, 2nd grade, and 3rd graders. This project causes a super cool, baking soda and vinegar reaction that will create a fun WOW moment for kids! This plane will FLY! I was stunned that this pool noodle airplane craft flew as high and as far for as long as it did. If I was stunned, my kids were in complete awe! Try this plane craft with preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, and 4th graders too. This pool noodle craft is perfect for lazy summer days as a summer craft for kids or as part of a transportation or plane theme!

Summer Fun

Looking for more outdoor activities for kids and things to do in the summer? Your toddler, preschool, pre k, kindergarten, and elementary age kids will love these fun ideas to keep them busy all summer long:

About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of Kindergarten Worksheets and Games. As a busy mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! Browse through more than 200,000 pages of FREE worksheets & educational activities for kindergartners! Plus don't miss her other sites www.123homeschool4me.com and www.preschoolplayandlearn.com

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