Back to School at FamilyEducation.com
|

Float an Egg

This activity will help your child understand the concept of density and learn why objects sink or float.

Materials

  • 2 clear drinking glasses
  • Teaspoon
  • Water
  • Salt
  • Marker
  • 2 eggs

Directions

  1. Fill one glass half-full of water.
  2. Mark the water level on the glass.
  3. Add salt a spoonful at a time and stir it into the water until it dissolves. Stop adding salt when it won't dissolve anymore.
  4. Notice what happens to the water level as you add salt. The level shouldn't rise; instead, the water gets denser as it becomes saturated with salt. When you dissolve salt in water, you cram more molecules into the water without making the water take up any more space.
  5. Fill the other glass half-full of plain water. Gently put an egg in each glass. The egg in the saltwater should float, and the egg in the freshwater should sink.
  6. The saltwater is denser than the egg, so it holds up the egg, causing it to float. The freshwater is less dense than the egg, so it can't hold up the egg, and the egg sinks.
|

Copyright 2001 by Patricia Kuffner. Excerpted from The Children's Busy Book with permission of its publisher, Meadowbrook Press.

To order this book visit Meadowbrook Press.


stay connected

Sign up for our free email newsletters and receive the latest advice and information on all things parenting.

Enter your email address to sign up or manage your account.

Facebook icon Twitter icon Follow Us on Pinterest

editor’s picks

highlights

Handwriting Headquarters
We've got handwriting practice worksheets, handwriting tips, and answers to your child's writing struggles, just in time for back to school. Brought to you by BIC.

11 Coolest Lunch Boxes for Kids
Send your child's lunch to school in style! Check out our picks for the 11 best lunch boxes with great features from BPA-free accessories to spill-resistant fabric.

7 Important Back-to-School Safety Tips
Follow these back-to-school safety tips to make sure your child stays safe on the way to school, in the classroom, and while on the playground.

Kindergarten Readiness App Wins Gold
Our Kindergarten Readiness app won the Gold Award of Excellence in the educational category at the 2014 Communicator Awards. This valuable checklist comes with games and activities to help your child practice the essential skills she needs for kindergarten. Download the Kindergarten Readiness app today!

Join BIC on our mission to save handwriting and Fight For Your Write! Writing helps kids become better readers, boosts their confidence and sparks their creativity. Visit BICFightForYourWrite.com to sign our petition to save handwriting!