Science is not always boring and only for the nerdy. Science can be fun and interesting even for young children. One of them is science with help of ice cubes and salt.
Ask your child "can you pick up an ice cube with a piece of string without tying a knot?" I bet your child will say no. Then it's your turn to show this cool experiment. You don't need any special equipment, just simple things that you can find easily in your house for this experiment.
Time: 10 minutes
Age: Any Age
Level: Easy
Materials
Method
First, we will do experiment without pouring salt on top of ice cube. Follow these steps:
Fill the glass to the top with water.
Cut a piece of string around 20 centimetres long.
Place an ice cube in the water. It will float.
Lay the string across the ice cube and glass.
Carefully pick up the ends of the string.
Ask your children, can you pick the ice cube? No! The ice cube will be still floating on water. Now, try the experiment with salt. This is what you need to do.
Cover ice cube and string with a layer of salt.
Carefully pick up the ends of the string.
Can you pick the ice cube with string? Congratulations! You picked up an ice cube with a piece of string!
Here's the science behind this experiment. Salt lowers the freezing point of water to below 0 degrees Celsius. When you add salt to the ice cube, the salt lowers the melting point of the ice. The salt is in a thin layer, so it melts a thin layer on top of the ice cube. The water cools down further and re-froze around the string.
In countries with snowy winters, they use salt to prevent roads from getting icy. The salt lowers the melting point of ice and stops roads from becoming icy and dangerous.
Have fun and I bet your children will hooked on this fun experiment.
Categories
#Science
#Any Age
#Easy
#Magic
