Why did my hot water bottle go cold?

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The weather has turned colder here and we have started giving the children hot water bottles to keep them warm in bed at night. For my 3-year-old, this is a new thing – she was pleased to have a snuggly warm toy to cuddle up to all through the night. But the next morning, when she woke up, she cried because her hot water bottle had gone cold!

So, why does a hot water bottle go cold overnight? Where does all the heat go?

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Is oil really made of dead dinosaurs?

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Oil is a type of fuel, which means that it is something we use to make energy. We burn oil to heat buildings and to make electricity, and we use it to make petrol and diesel for cars and other vehicles. There are also some rather surprising uses for oil, including chewing gum, lipstick and guitar strings!

But what is oil? How is it made? And does it really come from dead dinosaurs?

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How is light made?

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Light is all around us. The Sun shines on the Earth every day and we use electric lights or candles to light our homes, schools and workplaces. We use torches or streetlights when we are out and about at night and build fires for light and warmth when we go camping. Even in the middle of the night, there is some light from the stars in the sky.

But one of my daughter’s schoolfriends asked me how light is made. And her brilliant question made me think about natural and man-made light sources.

So, let’s find out more about light – what it is and how it is made…

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How do they make electricity?

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In Britain, it is easy to take our reliable electrical power supply for granted. Many things in our homes, schools, work places and public spaces are powered by electricity. Think for a minute about all the things you’ve done today – how many of them used electricity?

I’m sitting in my kitchen, using a laptop to type this blogpost with the lights on, sipping a hot cup of tea. I wonder how much electricity I’m using right now?

So, how do we make electricity? And how do we keep our power supply reliable?

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