Tuesday, 21 November 2017

Scientific enquiry continued...

Today Year 5 continued with their investigation following the 'Firework in a jar' investigation of a few weeks ago. The children thought of their own questions based on the results of the previous enquiry. They planned and carried out their own investigations changing the warm water to either milk, cold water or fizzy water, or changing the type of oil from baby oil to sunflower oil. They observed to see if a different reaction occurred and this is what they found...
Milk investigation: "When we poured in the food colouring, it went into little blobs and drained down into the milk and stained it green. There were no little 'explosions' of colour like before."
Cold water investigation: "This was quite a lot different. We think that the cold water was less dense than the hot water so the food colouring fell through the water more quickly than the first investigation. The blobs also started coming back up again."
Fizzy water investigation: "It looked a bit like the original investigation (warm water) except there was about a 2 second delay before the blobs sank. Also some of the bobs of food colouring stuck to the bottom of the jar."
Sunflower oil investigation: "It was all slimey and gooey. It turned green."