Science

Why does it Float? Explaining Density for Kids Experiment

January 18, 2021
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by Beth Gorden

Kids will have fun learning about what floats in water with this fun density for kids unit exploring mass, volume, density, and more with four different fun, science projects for kids. This simple density experiment for kids is fun for preschool, pre-k, kindergarten, first grade, and 2nd grade students.  Children will figure out what is less dense than water and they explore this scientific principle!

Kids will have fun learning about what floats in water with this fun density for kids unit exploring mass, volume, density, and more with four different fun, science projects for kids. This simple density experiment for kids is fun for preschool, pre-k, kindergarten, first grade, and 2nd grade students.  Children will figure out what is less dense than water and they explore this scientific principle!

Density for Kids

Before we can understand why some things float and some don’t we need to understand density! Density is a measure of how close together these pieces are. If they are close together, the object is dense. If the pieces are far apart, the object is less dense as their is more space for air. The best way to understand density for kids is to try a hands-on density experiment for kids. In this hands-on, easy science experiment for kids, children will discover what floats in water. Use this what is less dense than water project with preschoolers, kindergartners, grade 1, and grade 2 students.

    

What is density for kids

Start out by reading one of these fun picture books to teack kids about density!

does it float science experiment for kids

Density experiment for kids

Now let kids try floating different objects in a tub of water in this fun density experiments. I suggest using this free printable with suggestions as well as space for kids to write their prediction and the answer.

Density definition for kids

Now ask kids, what is heaviest – a pound of feathers or a pound of gold?

The answer is they weight the same – they both weight one pound.However, the amount of space the feathers take up would be greater as you’d need more feathers to make a pound. The density of the gold is higher than the feathers.

Basically, density is how compact an object is. Put another way,

density = mass of an object (how heavy it is) / by its volume (space it takes up)

Mass and Volume Science Experiment for kids

Density explained for kids

So what is mass and volume and how does it make things float

Take 3 identical boxes (could be mac and cheese, jello, corn bread, pasta, etc.) and fill them with different things so that they will have different weights.

  • the volume (or amount of space for each of the boxes) is the same for each of them
  • the mass (weight of each box) is different
density experiment for kids

Density Activities for kids

What determines if an object will float or sink in a fluid.  Help kids understand this principal with these 2 simple experiments:

  1. Aluminum Foil – Start by only slightly wadding a piece of aluminum foil and try to float it on water. Now make a second ball using the same size of aluminum foil but this time make it into a tight ball and see what happens.  The density of the second ball is greater so it will sink more than the first one.
  2. Ice and Water – Show kids that ice floats. But wait….ice is water? Put water in a paper cup and make a line on the side to show the level of water. Now put the cup in the freezer until freezes. The water expands as it freezes. Now even though the mass (weight) is the same, the volume (space it takes up) is different so the density of the ice is slightly less than the density of water.
This fun hands-on human body for kids project is such a fun way to learn about our amazing bodies! These Human Body Playdough Mats are a fun way for kids of all ages to learn about what is inside our body. Learn about human body parts for kids by completing the free printable playdouh mats. Children will learn about body systems for kids as they make bones, skeletal system, muscles, organs, and more! Use these playdough mats as part of a study of anatomy making human body model for kids from toddler, preschool, pre-k, kindergarten, first grade, 2nd grade, and 3rd grade students. Simply print the playdoh mats and learn about my body parts for kids with a hands-on science activity. ear-science-project skeletal system worksheet Kids will have fun learning about the skeletal system for kids with these fun, hands-on skeletal system project ideas for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th graders. From Lego brick skeletal system activities and candy skeletal system, to Playdough skeletal system and skeletal system printables - we have lots of creative skeletal system project ideas.

Human Body for Kids

We continued exploring the five senses with these grade school and human body preschool activities:
  • Grab this free printable 5 senses preschool printables to explore the senses of sight, taste, sound, smell, and touch
  • Human Body human body playdough mats – lots of choices to learn about various systems of the body including simple for preschoolers, skeletal system, organs, muscles, nerves, and more!
  • Teach kids about human cells for kids with hands on activities, free printable reader, human cell worksheets, and more!
  • Human Body Printables makes a printable book that teaches students all about their heart, brain, muscles, cells, skin, bones, lungs, stomach, intestines, and bladder
  • 4 EPIC Skeletal System Project ideas for kids – using things like pasta, life saver gummies, lego, and more you can learn about the human body in a fun memorable way
  • Free Skeletal System Worksheets for Kids – everything you need to teach kids about their bodies!
  • Kids will love learning about the ear with this model of ear for school project

Learn about the Parts of the Brain for Kids with this fun brain activity for kids and handy brain worksheets! Children will learn about the functions of the brain for kids as part of our human body lesson. Use this brain project with elementary age students in first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th garde students. Simply print pdf file with brain diagram for kids and you are ready to play and learn with hands-on human body activities for kids! Learn about the human digestive system for kids that moves food from their mouth, through their esophagus, stomach, small intestine, large intestine, and out the other end as poop. This digestion experiment is a ZANY and memorable human body project that is super simple, but effective in teaching first grade, 2nd grade, 3rd grade, 4th grade, 5th garde, 6th grade, 7th grad, and 8th graders about how food is digested in the body and waste is expelled as poo. Plus don't miss the free printable digestive system worksheets pdf file at the bottom of the post. If you are learning about the human body for kids you have probably explores the bones, muscles, and important organs like the heart, brain, and lungs. Now it's time to explore blood for kids! This hands-on activity and EASY blood model is a great visual of what makes up blood while being a silly blood activity for kids at the same time! Your preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grad, 4th grade, 5th grade, and 6th graders will love this human body activity for kids! paper bag lungs for kids

Human Body Projects

Learn about the human heart for kids with this fun lesson on the human body for kids! Kids will learn information, discover how to make a heart model out of playodugh and a working heart science project plus review what you've learned with our free printable heart labeling worksheets. These human body activities for kids are fun for elementary age kids in first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, and 7th graders too. Simply print pdf file with label the heart worksheet and you are raedy to learn about the heart for kids! Have you ever stopped to marvel at your hands?  Your hands can pick up small objects, write with a pencil, paint beautiful pictures, and open a stubborn jar of pickles. Help children discover how do hands work with this fun, hands-on human body project. In this human body for kids activity children will make a working hand model for them to discover how do muscles work Try this human body muscles for kids lesson with preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, and 4th graders too. Whether you are diving into an anatomy lesson for kids with a fun human body project or are just helping kids explore what happens to food after they eat it, this intestines for kids project is a MUST. In this digestives system experiment kids will learn just how big their intestines are and how does digestion work. This how we digets food activity is perfect for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grad,e and 6th graders too. Grab our human body printables and you are ready to learn about the human body for kids. We've been learning about the human body for kids in anatomy this year. We started by making our human body project where kids could see the bones inside of them. Bones make sense because they can feel the hard  object when they press on their bodies. Next we added the organs which also made sense to them as they know food goes somewhere - the stomach. Next up is teaching them about muscles. While they can make a muscle, this concept is a little more abstract. So we did this fun muscular system for kids activity to help students learn how do muscles work. Try this quick human body project with preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, and 4th graders too.

Human Body Experiments

100 Amazing Food experiments for summer science with kids  Learn how to make these beautiful chromatography flowers using coffee filters and markers. This is both a fun art project AND a simple science experiments for kids that explores colors while making pretty craft flowers for spring and summer.  This STEAM project is the perfect spring activity for toddler, preschoolers, pre k, kindergarteners, first grade, 2nd grade, and 3rd graders. Easy Ping Pong Ball Bernoulli's experiment water-balloon-science-experiments

Science for Kids

Looking for lots more fun, science experiments for kids? You’ve GOT to try some of these outrageously fun science experiments for kids! We have so many fun, creative and easy science experiments for elementary age children:

Animal Classifications for Kids Cootie Catchers  This amazing color changing slime is going to blow your mind! This heat sensitive slime will actually change color as your kids touch it because it is heat sensitive! This is a super cool project for kids you MUST TRY! Must try summer activity for kids to add to their summer bucket list  Looking for a really fun and memorable science experiment for kids? You will love these EPIC pop rocks experiment. Try this pop rocks science experiment with preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, and 4th grade students to try a simple chemical reaction. This Whether you try this pop rocks science experiments for homeschool science, at a science birthday party, or as part of a summer science project - this is a MUST try,  really cool science experimentkids will LOVE. Looking for that really cool science experiment for kids that grabs kids attention, teaches, and makes them say WOW! This squishy circuits project is fun and easy to do with a kid-approve Lego theme to keep preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students engaged. All you need are a few simple materials to try this Electricity Science Experiments and you are ready to play and learn! There are so many fun variations for this electricity experiments for kids

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About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of 123 Homeschool 4 Me. As a busy homeschooling mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! She has created over 1 million pages of printables to help teach kids ABCs, science, English grammar, history, math, and so much more! Beth is also the creator of 2 additional sites with even more educational activities and FREE printables - www.kindergartenworksheetsandgames.com and www.preschoolplayandlearn.com

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