Tuesday, 17 January 2017
Monday, 16 January 2017
We have been learning about light sources and reflectors.
Light sources give off light which we can see in the dark.
Reflectors do not: Reflectors only work when a light shines on them.
Reflectors don't work in the dark without a light shining on them.
We tried this out today.
We used a dark box, put an object in it, guessed whether the object is a reflector or light source, shut the lid and had a look.
The others (including the mirror) were reflectors.
The moon reflects light from the sun; it is a reflector!
Wednesday, 11 January 2017
They look fantastic!
Tuesday, 10 January 2017
We are learning lots of interesting things about China.
We saw a Chinese spoon, an indoor padded jacket (from Japan) and we practised using chopsticks.
We are also doing a play set in China long ago, so it will be good to know what traditional Chinese clothes look like and about some Chinese customs.
We can rub a balloon on a woolly jumper or on our hair.
If we do that the balloon will have an electric charge (static electricity).
Now if we bring this charged balloon beside an empty drinks can the can will move without being touched.
This is a spectacular thing to try (but works best on a dry day rather than on a wet day).
Monday, 9 January 2017
Teacher had a red cabbage in school with her today.
If you cut up a leaf and add very hot water the purple colour will start to run from the cabbage.
This red cabbage water is amazing!
It can help tell if something is an acid or an alkali (or neither).
We noticed the cabbage water turn pink or red with vinegar, lemon juice, orange juice, orange and pineapple juice, black current juice, and most surprisingly of all, with tea!
Bread soda did not make the cabbage water turn red or pink. Instead it made the cabbage water turn a bluey-green.
This is because bread soda is an alkali (and therefore good for cleaning!)
We wondered what would happen if we mixed an alkali with an acid. What colour would the water turn?