How do they put the colour in fireworks?

firework_bonfirenight

“Remember, remember the fifth of November, gunpowder, treason and plot…”

Bonfire night is an annual celebration in Britain. It is celebrated on November 5th every year and marks the failure of a plan, called the Gunpowder Plot, to blow up the Houses of Parliament in London. It is tradition to mark the occasion by lighting bonfires and holding firework displays.

Fireworks were invented hundreds of years ago and are used for lots of different types of celebrations and festivals throughout the year. My daughters want to know more about how fireworks work and how do they make such bright colours in the sky?

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How does temperature work?

cold_Winters_day

This question was asked on a cold Winter’s day. The water in the bird bath had frozen and I used hot water from the kettle to thaw it so the birds could drink. When I explained to my 6-year-old that water freezes at zero degrees Celsius, she wondered if that was the coldest that things can get. But it isn’t – in fact some things can get much, much, much colder!

So what happens when things get hot or cold and how do we measure temperature?

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