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Posts by David

Why is A4 paper the size that it is? News

by David, 23 October 2012 | 4 comments

Coloured papers

Take a sheet of A4 paper and measure its sides. A4 is 210 millimetres wide and 297 millimetres long. It’s probably the most common size of paper and it’s used in most countries. However, A4 side lengths aren’t simple numbers like 200 or 300 millimetres. So why don’t we use something easier to measure?

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Mimic memory Activity

by David, 13 October 2012 | 0 comments

Butterflies

These mimic activities are about memory. To do them well, you need to remember exactly what you saw. Your brain makes memories in a few stages. Sensory memory describes what happens when you briefly see an object. It lasts just a split second, however.

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Everything in its right place News

by David, 9 October 2012 | 0 comments

Newroz Venn diagram

Do you own a dog? Do you ride a bike to school? Do you have black hair? Each of these questions divides people into two groups – you either have a dog, or you don’t.

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Finding the Higgs boson News

by David, 11 September 2012 | 0 comments

two pieces of scientific equipment, each with an explosion inside.

A few months ago, scientists from the Large Hadron Collider announced they had found a new particle, one that could be the Higgs boson. The Higgs particle is thought to have properties explaining how other particles have mass. But the first signs of this new particle were detected over a year ago.

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Solar spiral optimises power News

by David, 14 August 2012 | 0 comments

Sunflower

Imagine a flat spiral, similar to a snail’s shell, coming closer and closer to a point. Now imagine more spiral lines, all centred on the same point. This shape looks like the clouds over a cyclone, or a whirling galaxy.

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