Help kids learn about the impact ice and salt have on temperature with this fun, easyscience for kids.
When we want to make our drinks colder or to keep them cool, we add ice.
No one likes warm lemonade or soda, right?
Ice makes drinks colder because the temperature of the ice is lower than the temperature of most drinks.
Water freezes at 32 degrees Fahrenheit, so we know the temperature of the ice.
Will adding more ice make a difference?
Is there a way to make the drink even colder without adding more ice?
Salt and ice experiment
Start by gathering the supplies you will need.
To make this experiment simple and easy to replicate, we will use water for our drink.
Pour 1/2 cup water into each of the drinking glasses.
Record the temperature of each glass of water.
Give each glass is stir and let them set for 5 minutes.
Ice salt experiment
After 5 minutes, record the temperature of each glass.
Keep recording the temperature every 2 minutes.
At what point do you see the temperature remaining steady?
When the temperature remains the same for 2 measurement times, move on to part two of the experiment.
If not, keep recording every 2 minutes until the temperature stabilizes, then move on.
(The water in this glass is probably going to have the lower temperature, as well.)
Add a tablespoon of salt to the water and stir.
Next, record the temperature of the water.
Did the addition of the salt have an immediate effect on the water temperature?
Check the temperature of the water every 2 minutes until it stays steady.
When the ice melted, there was nothing left to make the water colder.
In the glass with more ice, the presence of ice continued to drop the temperature.
When the salt was added to the cold water, the temperature dropped even more.
This causes the ice to melt.
Melting requires heat, which it takes from the ice and the water around it.
This lowers the temperature of the water even below the freezing point of fresh water.
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