Welcome to 2nd Class, Room 9. We have 22 children in our class - 8 girls and 14 boys. We work really well together and are great friends. Remember to click on photos to see them enlarged.
Monday, 21 December 2009
Pakastani Presentation
Tree Decorations
Wednesday, 16 December 2009
Floating Sinking Diver and Fish
Teacher had a fish that floats in water. He floated in a 2litre bottle.
He had his own air tank (a biro cap, with no hole in the top, held on to the fish with a paper clip and elastic band). We had to figure out a way to get the fish to sink and then float again.
We tried turning the bottle upside down (couldn't do this in the sea though), shaking the bottle and holding it sideways.
The way to get the fish to sink was to squeeze the bottle. When you do this, the fish sinks to the bottom, and when you stop squeezing, the fish floats again.
This happens because the air in the pen top helps the fish float. When you squeeze the bottle, the air in the cap gets squashed a little (it compresses). This means that the bottle fills a little with water instead. Now the fish hasn't enough air to keep him floating, and the fish sinks.
When you stop squeezing, the air in the pen cap expands again, and now there is enough air in the cap again so the fish can float. We also tried this with a diver and it works in just the same way.
Detergent Power
We got a cardboard boat to float on the water. The top of the water has surface tension on it. It is like a skin made by water molecules holding tightly on to one another.
Water falling Sideways
Normally when you spill water out of a jug, it will fall straight down.
Bath Tricks
We did some interesting science that we can easily practise in the bath at home. We got a bottle and filled it with water, put a hand on top, turned the bottle over and took the hand away. We had to guess what would happen.
It was as we thought - the water that was in the bottle rushed out once the hand was taken away. The second time we tried this, we only took our hand away when the bottle was under water. This time the water stayed in the bottle.
This is because the water in the bottle wanted to get out, while the water in the basin wanted to get in, so the water ended up going nowhere and stayed in the bottle.
Next we got a yoghurt pot and a square of cardboard. We filled the pot with water, put the card on top, turned the pot and card upside down and took our hand away. Surprise, surprise, the card stayed on the bottom of the pot without falling off. This is because the air on the bottom of the card is pushing the card up into the pot, and the water is trying to get out, so both end up going nowhere at all.
Nativity Time
Tuesday, 15 December 2009
Another Christmas play
Ms. Crotty and Ms. Ferguson treated us to a wonderful Christmas show.