One of the experiments we took part in during the visit from Scientists in School involved the use of food colouring, and water in a bowl. We learned in the food coloring experiment that hot air is lighter than cold air. We used water instead of air because water and air are similar substances. We used cold blue food coloring to represent cold air and hot red food colouring to represent hot air. When we poured the food coloring in to the water bucket, the red 
food coloring rose to the top whereas, the blue food coloring sunk to the bottom. Again, this is a good example of food coloring acting as hot and cool air pressure. When the water temperature evened out, the two colours blended together and turned into purple. Therefore, when air is hot it rises and when air is cold it drops.
food coloring rose to the top whereas, the blue food coloring sunk to the bottom. Again, this is a good example of food coloring acting as hot and cool air pressure. When the water temperature evened out, the two colours blended together and turned into purple. Therefore, when air is hot it rises and when air is cold it drops. Why do you think this information would be valuable for our flight unit?
Kaiden, Michaela, Malik, Christopher, Jessica and Ryan
Doing the cold and hot air experiment was really fun. When we were watching the cold air drop and the hot air rise we started figuring out that hot has no mass and cold air does. Did you know that? Before this experiment I didn’t. I wonder what other new info we are going to learn throughout this unit. Michaela
ReplyDeleteI think that this experiment was really cool, not only because it shows that hot air is lighter than cold air, but it also shows how air and water are related. I am so happy that our teachers have set up so many different activities,(podcasts, scientist in the school,experiments,) and am looking forward to what will come next! Holly
ReplyDeleteI really enjoyed when the guest scientist came in and taught us about air and flight. I especially enjoyed doing the cool experiments like mixing red and blue liquids in a container filled with water - and seeing what was going to happen. I first thought that nothing would happen, but then realized that when the red liquid which was heated, mixed in with the water it did not go to the bottom of the container but stayed at the top. This is because hot air rises. This is not the same for the blue liquid. When the blue liquid got mixed in the water, it slowly went to the bottom because cold air drops. Ravi
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