Crumbs #71 Refraction aka Catching up on Physics in the YL classes

Ingredients

• A glass of water, if you have a big group, the bigger the glass the better.
• A set of visuals (I prepared my own based on what I found googling refraction), you can see them in the photographs. I used an A4 piece of paper, folded in half as I wanted it be able to stand on its own on the table.

Procedures

• Before the Science / Lab lesson, we started the day with the poem dedicated to colour blue, modelled on the poems from the Little Learning Corner, we looked for the blue items around us and we had a whole section of the lesson devoted to adjectives, describing and guessing the objects in our Magic Bag. All of which were blue, of course. In the Art lesson, the kids also made a beautiful craft with the bottle caps.
• In the beginning of the Science lesson we talked about water and the clever ocean animals. We watched some cool videos about the clever octopus, the flying birds and the orca.
• Afterwards I presented the three experiments. The first one was the experiement with the cold and hot water (aka Melting the Skittles aka Checking How Skittles Are Made of Sugar and Food Colouring). More of it in an older post here. The there was the Surprise Experiement (check it out here) and the Illusion Experiment aka refraction.
• We went into our Lab (the dining room) where I prepared all the ingredients and tools.
• I showed the kids the glass of water and the first picture with the arrows. We talked about the direction of the arrows and we demonstrated and practised ‘left’ and ‘right’. Afterwards I showed the picture through the glass of water and, of course, the arrows changed the direction, almost magically. We learned the term ‘refraction’.
• Afterwards we proceeded with the other two pictures.

Why we like it

• Just like the previous crumbs post, devoted to red, fire and volcanoes, this one is about the experiments we did as part of our Autumn Camp. The second day was devoted to the colour blue and water. This was one of the experiements we did.
• It is a super simple experiment, in its simplest forms it involves only a glass of water and a piece of paper with two arrows.
• Again, it was fun. For me, because I could realise that I never ever heard about it in my Physics classes in high school and it felt good to be catching up on my primary or secondary education. For the kids, because it looked like magic)
• It helped to make this whole experiment kinesthetic by showing the direction of the arrows with our arms, by naming the colours of the clouds or by holding the side of the card where the blue cloud was with my hand and checking how the cloud moved to the other side or by showing the direction of the stripes, on the paper and as seen through the water.
• It was also a lot of fun to experiment with the distance between the glass and the paper to find the best angle.
• As with the other experiment (Crumbs #70), this one also can be used with a variety of topics and lessons: water-themed classes, blue-themed classes, black and white and optical illusions lessons or, simply, Physics that, can, actually, be fun! Basically, you can make it as scientific or as magical as you want!
• We did not have time for that but this lesson also has some potential for creating our own drawings that can be used in the experiments to give the kids an opportunity to be creative and to experiment with different designs. It is also possible to dip the pictures in water and see how they change. See the links here and here, here (experiment at 2’04) and here (really cool ideas!) Next time!

Happy teaching!