Nitrogen is an essential element for living organisms as it’s needed to make proteins for growth and repair and other biological functions. Nitrogen moves through the air, soil and living organisms ( plants, animals and bacteria ) in a process called the Nitrogen Cycle. Where is nitrogen found? In the air as a gas. About…
The Archimedes’ Principle is a scientific law which explains why some objects sink and some objects float. Archimedes was one of the world’s greatest scientists. He was a mathematician, inventor, engineer and astronomer, but is arguably most famous for his Eureka moment which led to the development of the Archimedes’ Principle. Buoyancy and Archimedes Objects…
The ocean looks blue because of how it absorbs sunlight. Water absorbs the longer wavelength colours at the red end of the light spectrum and the short wavelength violet and ultraviolet light. Blue light is absorbed the least and is scattered and reflected back into our eyes, which makes the ocean look blue. The actual…
Visible or white light is made up of a range of colours each with a different wavelength. One way to see the different colours is to use a prism to split the light. When white light enters the prism it slows down and changes direction. The amount the light changes depends on the wavelength. Red…
Do you know why the sky looks blue? Light from the sun is made up of all the colours of the rainbow. A rainbow in the sky is formed when sunlight is refracted and dispersed in drops of rain or mist which splits the white light into its constituent colours. Red light has the longest…
Do you think of cows and global warming in the same sentence? Most people think of carbon dioxide as the most troublesome greenhouse gas, but actually, methane is the more damaging of the two, as it traps much more heat than carbon dioxide. Methane pollution is thought to cause around a quarter of the global…
We’ve all heard about climate change, but what is it, and how can we teach our children about it? First, children need to be informed, and second, they need to feel empowered, to feel like they can make a difference. Remember, lots of small actions add up to a big result. What is Climate? Climate…
Fresh ice feels sticky because when you touch it, the ice immediately freezes the moisture in your skin, which makes the ice feel sticky to touch! A great way to learn about the properties of ice is to try some ice experiments! When using ice with small children always leave it to melt a little…
Have you ever looked up at the moon and wondered about its pockmarked landscape? Craters are fascinating geological features that give a small insight into the history of our solar system. This is a great ( and very easy ) activity for discovering how craters are made. Did you know the moon’s surface has millions…
Do you know how to find the North Star? Most people think of the North Star ( Polaris ) as being the brightest star in the sky, but there are actually many stars much brighter. The reason Polaris is so important is because the axis of Earth is pointed almost directly at it, meaning Polaris…
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