If you’ve ever seen a river rushing down a mountain or played in breaking waves at the beach, you’ll know that moving water contains a lot of energy. A river can push you and your kayak downstream, sometimes very quickly, and waves crashing into you at the beach can knock you back, or even knock you over.
Energy in flowing water
The energy in these moving waters comes from gravity. Water travels around Earth in a water cycle (see below). Water evaporates (turns into a gas) from the surface or is released from plants (transpiration). When the released water vapour is carried up to higher altitudes – such as mountainous regions – it cools down and condenses into liquid cloud droplets. When these cloud droplets become big enough, they fall from the sky as precipitation, either as a liquid rain or – if it is cold enough – as a solid snow.
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Denne historien er fra Issue 65-utgaven av The Week Junior Science+Nature UK.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Camera Obscura
Imagine stepping inside a dark room, where the only source of light comes through one small hole in the wall.
MANCHESTER SCIENCE FESTIVAL
From 18-27 October, shoppers at the Arndale shopping centre in Manchester, England, will face a giant spider.
Should musicians stop touring?
Multiple concerts travelling around the world have a big impact on the environment.
Are ghosts real?
Plenty of people believe in ghosts, but it's hard to find proof.
SMASH STEREOTYPES
In an extract from his prize-winning book, scientist and writer Adam Rutherford shows you how to use the power of science to fight racism. This chapter, titled Myth-Busting, is all about sport.
Animal awareness
What would it feel like to be another animal?
Hamza Yassin
Go behind the camera with a wildlife filmmaker.
WILDLIFE WATCH
Ben Hoare goes on a safari from his sofa to discover how nature documentaries are made.
Big bum breakthrough
A team of researchers who found out that mammals can breathe through their bottoms have won a prize at the lg Nobel awards.
A jaw-dropping undersea snap
A photograph of a Bryde's whale feeding on a heart-shaped \"bait ball\" of sardines has won the Ocean Photographer of the Year contest.
