Site news

The BIG Question

Picture of Mrs Brice
The BIG Question
by Mrs Brice - Sunday, 30 October 2011, 9:41 PM

The winner of the first week of the BIG Question was... Jamie Chew - Year 11

Where does wind come from?

It is a collection of air molecules and comes from areas in places with low or high pressures. Wind is the movement of air set up by the unequal heating of the earth's surface by the sun. The movement of air is in the form of a convection current. When air next to the earth is heated, it expands and becomes lighter. This warmer, lighter air is pushed up by the colder, heavier air that surrounds it. Cold air is heavier so it exerts a greater pressure than warm air. Winds are formed when cold air from high pressure areas move to low pressure areas where the air is warmer.

Congratulations Jamie - you win 250 vivos!

We had an amazing response to the BIG Question with around 140 answers submitted.  Well done everyone - keep sending us your answers to be in with a chance to win vivos each week.