On Wednesday we made Archimedes screws out of plastic bottles, tubes and wire. First we had to get a bottle and some wire and plastic hoops. We put the hoops onto the bottle to hold the wire. Then we tied the pipe onto the bottle with the wire in a spiral. Then we put baking soda and vinegar into the bottle to make them expand and tougher. We took them outside and tried them out using basins of water. We found that the water always went to the lowest point and towards the top.

Then we set up mirrors in a semi-circle to reflect the sun onto a thermometer that told us how hot is was getting. It got hotter and colder as the clouds came and went. We had to keep adjusting the mirrors. The hottest we could get it was 39.5 degrees. The coldest was 12 degrees. by primary 6 & 7