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This week, we will be thinking about how a 'thing' can change state - from solid to liquid, or liquid to gas. We can often do this through the processes of heating and cooling. We can use heat to turn from a solid to a liquid with the melting process, or we can cool to transform a liquid into a solid by freezing it.


I'm sure you can think of a lot of ways that you may have done this before - and I bet most of them are to do with FOOD! We can melt and freeze butter, ice lollies or, our challenge for today, CHOCOLATE!


Please work through the PP and then complete your chocolate challenge. 

You will need:

  • At least 4 squares of chocolate (3 for the science, 1 - or more - for your tummy!)
  • Tin foil
  • 3 different temperatures of water
  • An adult to help you with the hot water

(It doesn't matter if you don't have a thermometer to check the temperature of your water. You could just have a bowl of cold water, one warm and one hot - as long as they are different).


I tried the chocolate melting challenge myself. I placed the little tin foil tray in the water and popped the chocolate chunk on top. After 2 minutes, I gently smushed the chocolate with a spoon so that I could see how much it had melted and then took a photo. You could try this method - or perhaps you could time how long it takes for the chocolate to completely melt on top of the different temperatures of water. Perhaps you don't want to use chocolate; you could use an ice cube or lolly, or even butter instead.


Have a look at my photos below. Which photo do you think matches each temperature?