Hot and Cold Water Density Experiment
A Peculiar Playdate #6 ∙ Published Jan 2, 2019
Hot and cold water density experiment! What is it all about? Well, we know that water usually flows down, right? Except it doesn’t need to. In this experiment, we’d like to show that it is possible to make the water flow upwards. It is a little intricate, but with a bit of practice you can master it and impress kids during next playdate!
What you need
- Hot water
- Cold water
- Two glasses
- Some sort of a plastic card
- Food coloring to make the experiment more visual. We used red for hot and blue for cold water.
How to make it
Place a plastic card on top of the glass with cold (blue) water
Now quickly rotate the glass upside down!
Place the blue water glass onto the red one with hot water, and align them
Carefully remove the card
The hot water will flow up! Gradually, the blue, cold water will mix with hot one and you’ll see purple water!
Why it happens
It is all about a difference between hot and cold water density. Cold water is much heavier than a hot one. On the other hand, hot water is lighter and tends to go up.
If you wish to demonstrate the effects of water density even further, consider placing a glass with hot water on top of the one with cold. You’ll see that the water will stay in place and won’t mix!
Feathers in exchange for prizes
While working on this playdate idea, our Keedoo Parrot has lost four feathers 😔 Please help us! Collect them by bringing this idea to life with your kids, and we will gratefully exchange them for valuable prizes.
- Try making this experiment
- Share your experience on Instagram or Facebook
- Mention @getkeedoo in comments
- Nominate two families to do the same
- We will contact you to add four feathers to your Keedoo account that you can exchange for prizes in our mobile app
- Follow @getkeedoo on Instagram to see new prizes
Spread the word 🙌