Kingsfield Primary School

We believe every child is special

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                                   Wow Science

 

W/B 11.3.19

This week in Wow Science, we have been making raisins dance! First, we filled a glass with lemonade, then made predictions about what would happen if we added raisins; would they sink or would they float? We added the raisins and watched in wonder as they first sank to the bottom, then began to rise to the top, before sinking to the bottom again! 

We discussed that this was happening because lemonade is carbonated, this means it is full of a gas called carbon dioxide (this is what makes it fizzy!) The bubbles really like the rough surface of the raisins and cling to them. 
Carbon dioxide is less dense (lighter) than lemonade, so the bubbles help the raisins float to the top of the glass. When the bubbles pop, the raisins sink back to the bottom of the glass, where they meet more bubbles and the process happens all over again! 
We complete a different demonstration every week - ask your child about what they have been learning in Wow Science. 
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W/B 25.2.19

This week in Wow Science, we have been making “blobs in a bottle.”

First, we put water, oil and food colouring into a clear bottle and watched as food colouring and water mixed and the oil sat on top of the water; this is because oil is less dense (or lighter) than water. 
 
We then put an effervescent tablet into the bottle (we used an Alka Seltzer) and watched in amazement as the bubbles from the tablet mixed with the water and travelled through the oil, making a cool lava lamp effect! When the water and Alka Seltzer combined, it formed a gas called Carbon Dioxide, which travelled to the top of the mixture, taking the coloured water with it! 
 
We complete a different demonstration every week - ask your child about what they have been learning in Wow Science.
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