Today Piwakawaka have done some science about presure and gravity. We had a hotwaterbottle, 2 peices of wood, a tube and a plastic bottle. We put the hotwater- bottle in between the 2 peices of wood and connected the tube to the hotwaterbottle and the plastic bottle. Then someone stood on the 2 peices of wood with the hotwaterbottle between the wood, and they started going up when we poured the water into to the plastic bottle, which then went down the tube and into the hot water bottle. The water started to go down the tube when we put the water into the plastic bottle and up when we put the water down. I learned that the reseriviar (the plastic bottle) when it has water in it goes down because of gravity when it’s up high and down because of presure. Here is some photes…
Have you ever down this kind of science before?