We had a cup of water on the window sill for a few days. It used to be full, up to the line, but now some of the water has evaporated.
Today we learned all about the Water Cycle. We know that water when heated will turn in to gas (this is called evaporation). Gas outside will form clouds, clouds will join together to form bigger clouds and they will let the water fall back to earth as rain. This rain will turn to puddles, rivers and seas. The sun outside will cause the water again to evaporate, and the water cycle will keep on going.
Friday, November 21st, 2008 
He even showed us how to bounce bubbles, put our hands through them, how to blow a bubble inside another bubble, and how to make a string of bubbles all joined together.
We can make really good bubble mixture using wash up liquid, water and glycerine. We are looking forward to having lots of fun ourselves with our bubbles.
Here are our results: Vinegar, lemon juice, cranberry juice, lemonade, apple and blackcurrant juice, ribena
We found that wash-up liquid and bread soda both turned the water a blue-green colour. These are alkalis.
Finally we found that a drink of water didn't change the colour at all. Water is neutral. Red cabbage is a natural PH indicator and can tell whether something is an acid, an alkali or neutral. We can't wait to try this at home with our parents.
We found out that when you spin a raw egg and then gently put your hand on it and then take your hand off the egg, that the egg keeps on spinning. This is because the inside of the egg is not solid, and will keep moving once it has started moving, if it can - rather like a child in a car who has no seat belt on will keep on moving forward if the car comes to a sudden stop.
A photographer from the local paper took our pictures with the aeroplanes.
The candle stayed lighting in the air for a while, until all the air got used up. Then the candle went out. Now because the jar was empty (all the air was used up) the water rushed in to fill the space in the jar. Look at all the water that rushed into the jar to fill up the space that the air used to take.
We have a thermometer and a water gauge in our class. Each morning we put them outside to measure the daily temperature and how much rain has fallen while we are at school.
She put a glass (full of air) over the candle. The candle burned inside the upside-down glass for a while. Then it went out because the burning candle used all the air in the glass.
Teacher tried again, this time with a jar. 
The candle burned for longer because there was more air in the jar than in the glass. We counted how many seconds each candle burned for. 
After a while tiny drops of water formed on the outside of the glass. This is because some of the water vapour in the air changed to liquid when it touched the cold glass. 
It burned inside the upside-down jar for a while. Then it went out. After burning the candle for a while, each time lighting it and waiting until it went out, the inside of the jar became a bit wet. 
This is because the hydrogen in the candle joined with the oxygen in the air to form water. 
We half filled it with rice, then put a bouncy ball in the cup and filled the rest of the cup with rice. Next we gave the cup a shake and had to guess whether the ball would go to the bottom or top of the cup, or stay where it is when the cup is shaken. When we shook the cup, the ball ended up on the top.
This is because the little rice pieces rush in to fill any air spaces caused by the shaking. This means that the ball ends up on the top each time. This explains why all the big pieces of cereal are always at the top of the cereal box when we open it.
Next we got another cup and filled it with lemonade. We dropped some raisins into this cup. At first the raisins sank to the bottom, but then the fizzy air bubbles in the lemonade started sticking to the raisins and the raisins started to float. After a while the air bubbles burst and the raisins sank again. They looked as if they were dancing. 
One of the boys in our class has a dad who works for a computing company and a mum who works for a mobile phone company. They came to our class today to tell us about their jobs and to show us how science and engineering help them in their jobs.
First we were shown a very interesting show. There were lots of pictures of computers from years ago to modern computers. We heard a little about how computers work. We were shown a very basic computer (a calculator), a laptop and a desktop computer. We already know a little about computers because we use them in class and some of us use them at home, but it was so great to hear about what computers looked like when our parents and grandparents were small.
Next we heard about mobiles and how they work - when we call a number the messages get beamed from the mobile to a huge tower, and then get beamed to the other phone. We heard a little about being safe around the towers, and never climbing them. We learned where to carry a mobile (not near our hearts) and most importantly we learned never to use our mobiles when driving.
