Love simple science experiments?  YES!! Well here’s another one the kids are sure to love! Explore the freezing point of water and find out what happens when you freeze salt water. All you need are some bowls of water, and salt.  We love easy science experiments for kids!

SALT WATER FREEZING EXPERIMENT

SCIENCE FOR KIDS

This simple freezing water experiment is great for learning about the freezing temperature of water, and how that compares to salt water.

Our science experiments have you, the parent or teacher, in mind!  Easy to set up, quick to do, most activities will take only 15 to 30 minutes to complete and are heaps of fun!  Plus, our supplies lists usually contain only free or cheap materials you can source from home.

Check out our favorite chemistry experiments and physics experiments!

Grab some salt and bowls of water, (Suggestion – follow up this experiment with our ice melting experiment) and investigate what happens when you freeze water with and without salt in it! 

USING THE SCIENTIFIC METHOD

The scientific method is a process or method of research. A problem is identified, information about the problem is gathered, a hypothesis or question is formulated from the information, and the hypothesis is put to test with an experiment to prove or disprove its validity.  Sounds heavy…

What in the world does that mean?!? The scientific method should simply be used as a guide to help lead the process.

You don’t need to try and solve the world’s biggest science questions! The scientific method is all about studying and learning things right around you.

As kids develop practices that involve creating, gathering data evaluating, analyzing, and communicating, they can apply these critical thinking skills to any situation. To learn more about the scientific method and how to use it, click here.

Even though the scientific method feels like it is just for big kids…

This method can be used with kids of all ages! Have a casual conversation with younger kiddos or do a more formal notebook entry with older kiddos!

Click here to get your printable freezing water science project!

FREEZING WATER EXPERIMENT

Want more experiments with water? Check out 30 fun water experiments!

SUPPLIES:

  • 2 Bowls
  • Water
  • Salt
  • Spoon

INSTRUCTIONS:

STEP 1: Label the bowls “Bowl 1” and “Bowl 2”.

STEP 2: Measure out 4 cups of water for each bowl.

STEP 3: Add 2 tablespoons of salt to bowl 2, a little at a time, stirring as you go.

STEP 4: Place both bowls in the freezer, check the bowls after a hour to see how they have changed.

Optional – use a thermometer to measure the water in both bowls.

STEP 5: Recheck them after 24 hours. What do you notice?

FREEZING POINT OF WATER

The freezing point of water is 0° Celsius / 32° Fahrenheit. But what temperature does salt water freeze at? If there is salt in the water, the freezing point is lower. The more salt there is in the water, the lower the freezing point will be and the longer the water will take to freeze.

What happens when water freezes? When fresh water freezes, water molecules of hydrogen and oxygen bind together forming ice. Salt in the water makes it harder for the molecules to bind with the ice structure; basically the salt gets in the way of the molecules, blocking them from joining the ice.

That’s why salt water takes longer to freeze. It is also why salt is sometimes used on icy roads to slow down freezing and make them safer to drive on.

MORE FUN EXPERIMENTS TO TRY

Make a floating drawing with our dry erase marker experiment.

Blow up a balloon with just soda and salt in this soda balloon experiment.

Make a homemade lava lamp with salt.

Learn about osmosis when you try this fun potato osmosis experiment with the kids.

Explore sound and vibrations when you try this fun dancing sprinkles experiment.

Grab some marbles to use with this easy viscosity experiment.

FROZEN WATER EXPERIMENT FOR KIDS

Click on the image below or on the link for more easy science experiments for kids.