A project with salt water and ice
Welcome to Quatr.us Study Guides!

Salt Water and Ice

Salt Truck
A salt truck spreading salt on the road

You can easily see that salty water freezes at a different temperature than fresh water. If you live somewhere where it gets cold in the winter, you probably already know that you put salt on the sidewalk to melt the ice so people can walk on it.

If you don't, though, you can test this out by filling two cups with water and putting a spoonful or two of salt in one of them. Stir, and put both cups in the freezer. How long does it take each of them to freeze? Does it make a difference if there is even more salt in the water?

The reason water takes longer to freeze when it is salty is that the salt molecules get in the way of the water molecules when they try to form regular ice crystals.

More about salt
Salt in human history

Bibliography and further reading about salt:

More about sedimentary rocks
Quatr.us home


For Presidents' Day, check out our articles about Washington in the Revolutionary War and Lincoln in the Civil War. Find out about the Constitution, the Bill of Rights and the other Amendments, and how Washington promised to include freedom of religion.
Please help other teachers and students find us: link to this page from your class page.
Karen Carr is Associate Professor Emerita, Department of History, Portland State University. She holds a doctorate in Classical Art and Archaeology from the University of Michigan. Follow her on Instagram or Twitter.
Cite this page
  • Author: K.E. Carr
  • Title:
  • Site Name: Quatr.us Study Guides
  • Publisher: Quatr.us
  • Date Published:
Proud of your class page, homework page, or resource page? Send it in and win a Quatr.us "Great Page!" award!
Sign up for more free articles and special offers in Quatr.us' weekly newsletter:
We will never share your e-mail address unless you allow us to do so. View our privacy policy. Easy unsubscribe links are provided in every email.
Comment on This Article

Cool stuff we've been enjoying: Looking for birthday gifts? Check out these new Chromebooks - all the computer you need for only $229.00!. Then study in peace with these Beats wireless headphones - for the exact same price! When you're done, show off your presentation or watch a movie with this excellent smartphone projector for only $39.99!


Does your class page honor diversity, celebrate feminism, and support people of color, LBGTQ people, and people with disabilities? Let us know, and we'll send you a Diversity Banner you can proudly display!
Looking for more?
ADVERTISEMENT
Quatr.us is loading comments...
(Comments will appear after moderation, if they are kind and helpful. Feel free to ask questions, and we'll try to answer them.)
Cite this page
  • Carr, K.E. . Quatr.us Study Guides, . Web. 22 February, 2017
ADVERTISEMENT