I can’t believe we are already at the end of week two of Spectacular Summer Science.
The UK has been very hot recently, so we had another go at making slushy drinks, a great ice experiment, to cool down with.
Freezing is the process in which a liquid turns into a solid when it’s temperature drops below it’s freezing point.
Melting is the point at which a solid turns into a liquid. Apart from a few exceptions the freezing and melting point are usually the same temperature.
There are lots of possibilities with this activity, you could:
- Set up two or three glasses with the same number of ice cubes and place them in different places to see which melts first.
- How about seeing what colours you can make with the different juices.
- Do the ice cubes melt faster if you stir them?
Let the juice cubes melt a little bit before removing from the ice cube tray. They will feel sticky to start with, this is because the ice is freezing the moisture in your fingers.
Did You Notice?
Did you notice that the frozen juice took up more space in the ice cube tray and the liquid juice? This is because of the shape of water molecules, as they freeze they link together forming a structure with big holes, the gaps in the frozen water take up more space than the liquid form.
We call the temperature at which water changes from a liquid to a solid it’s freezing or melting point. The two are usually the same, but liquids can be supercooled below their freezing point. we can supercool water or a drink using a mixture of salt and ice like the activity below.
Reading confetti has another fun twist on the idea, and made slushy drinks using a salty, ice core. I really want to try this.
Reading Confetti also investigated whether different temperature water solutions and the addition of salt, made ice cubes melt at different rates.
I really hope you are enjoying our summer of science, do let me know if there is anything you would like to see us try.
If you take any videos of you and your children doing any of our activities please share on G+ and tag us using #ScienceSparks. I’d love to see and share them around.
Spectacular Summer Science
Day 1 – Baking Soda Ice Cubes
Day 2 – Slipping and Sliding
Day 3 – Fun Heart Rate Investigation
Day 4 – Mini Beast Hunt
Day 5 – Pretty Flowers
Day 1 – Splatter patterns
Day 2 – Monster Tea Party
Day 3 – Dirty Potatoes
Day 4 – Summer Density
We also have a great competition running with Twinkl, do check it out.