June 21, 2024
1 Solar System Way, Planet Earth, USA
Science And Technology

Ten science experiments with salt for home and school

Salt is a brilliant, versatile and inexpensive ingredient for home science. It can be used to cool a drink or make ice cream quickly, for a lava lamp, and to make colored salt crystals. Salt is an interesting substance because it lowers the freezing point of water, which leads to many interesting scientific experiments.

Salt can also be used to preserve food and is believed to have been used by humans since 6050 BC*.

Curious facts about salt

The salt we eat has the chemical formula NaCl (sodium chloride).

A mixture of salt and water can conduct electricity.

Salt can preserve food as it slows the growth of microorganisms.

Salt is used to treat roads in winter as it reduces the temperature at which water freezes.

Science Experiments for Kids Using Salt

Raise a piece of thread with ice and salt.

Use salt to lift a piece of ice with a rope. In this clever trick, the salt melts the ice around the thread. The ice then refreezes on the rope, allowing the ice cube to be lifted.

Scientific activity to lift ice with thread and salt.

Chill a drink with ice and salt.

Find out how chill a drink with ice and salt. This is a great activity for a sunny day and a fantastic visual science demonstration as you can watch the temperature drop in seconds.

a thermometer in a container with ice and water with a can of drink for a scientific investigation

salt lava lamp

TO salt lava lamp is a fun version of the more traditional lava lamp activity. It's easy to set up and looks great.

Salt lava lamp made with water, oil and salt.

colored salt crystals

Creating colored salt crystals It's a brilliant way to learn about evaporation. You will need a warm day, food coloring, water and salt.

Colored salt from an evaporation investigation.

ice cream in a bag

Salt and ice are used to make ice cream in a bag. This traditional science activity tastes amazing and only uses basic ingredients. We like to use chocolate milk to make chocolate ice cream!

Make homemade ice cream in a bag.

Salt and water density trick

Another simple science experiment using salt is this density trick. If you add salt to water, its density increases. This means that you can create a colorful density demonstration with a layer of salt and water and a layer of food coloring and water.

salt water density trick

Melting ice cubes

Find out if a Ice cube melts faster in salt water. or fresh water with another simple scientific activity.

Labeled diagram of a freshwater and salt fusion activity

Instant slushy drink

This works the same way as the ice cream in a bag activity. We use fruit juice instead of milk to make a instant slushy drink! Hmm!

boy holding a slushy drink made with ice and salt

float an egg

Use salt to increase the density of the water and float an egg!

egg floating in water and salt

Frost in a can

Use the cooling power of ice and salt to make frost appear on the outside of a can.

frost on a can scientific activity

More salty science experiments

Little Bins for Little Hands has a nice salt painting activity.

Live Well Mom has some beautiful salt snowflakes.

do your thing making plasticine using salt!

You can think of something else scientific experiments using salt for us?


*history of salt

10 scientific experiments using salt

Last updated on May 27, 2024 by Emma Vanstone

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