How it Works Book of Junior Science

How It Works Book Of Junior Science 5th Edition

This fifth edition of the How It Works Book of Junior Science has been written to feed young minds with the most inspiring and amazing things about the world we live in. Jam-packed full of facts, trivia and easy-to-follow diagrams, this is a comprehensive guide to our planet, the animals we share it with, our own bodies and the way science affects our day-to-day lives. Featuring: Science in action - Make your own experiments at home and discover how science is used in the world around us. The human body - Learn how your head, shoulders, knees and toes work, and much more! Planet Earth - Explore rainforests and learn all about the weather in caves. Amazing animals - Find out why birds have beaks and how far animals migrate.

United Kingdom
Future Publishing Ltd
7,78 €(TVA Incluse)

dans ce numéro

1 min
welcome to how it works book of junior science

We humans have always been fascinated by our world, and over hundreds of thousands of years we’ve built up a body of knowledge about the things around us so we know what they are, how they work, how they interact, and what the processes are underlying everything from the migration patterns of birds and other animals, to the forces that hold us all on the ground. This is science, and it is one of the most inspiring and vast voyages that mankind has ever made. This edition of the How It Works Book of Junior Science has been jam-packed full of the most incredible things about our planet, from our own bodies to the animals we share the world with, and the science that supports it all. It’s been written…

12 min
20 home experiments

If you’ve ever seen a hovercraft and thought it looks amazing but you’d never be able to have one, think again. You can make one in minutes! It’s just one of our 20 experiments you can do at home, no lab coat required. Not only are they fun to do, but they will also explain some of the basic parts of our everyday lives, like how magnets work, the secret to how planes stay airborne and the reason why plants will stop at nothing to reach sunlight. Using everyday items like combs, rubber bands and string, we will demonstrate real science. After all, the Greeks, Romans and Egyptians never had electron microscopes and spotless purposebuilt labs, but they made huge headway with medicine, geology, engineering and maths, to name a few.…

3 min

Inside the atom Dissecting what makes up an atom At the centre of every atom is a nucleus containing protons and neutrons. Together, protons and neutrons are known as nucleons. Around this core of the atom, a certain number of electrons orbit in shells. The nucleus and electrons are referred to as subatomic particles. The electrons orbit around the centre of the atom, which is due to the charges present; protons have a positive charge, neutrons are neutral and electrons have a negative charge. It is the electromagnetic force that keeps the electrons in orbit due to these charges, one of the four fundamental forces of nature. It acts between charged objects – such as inside a battery – by the interaction of photons, which are the basic units of light. An atom…

2 min
explore a nuclear reactor’s core

This image shows a nuclear reactor’s core surrounded by Cherenkov radiation, which gives it the characteristic blue glow. Cherenkov radiation is a unique phenomenon where particles that are electromagnetically charged – such as electrons – and emitted from a nuclear reactor’s core travel faster through its coolant (pressurised water) than the phase velocity of light. This process causes the particles to polarise the water molecules, which then proceed to rapidly descend back to their ground state, expelling photons – hence the perceived blue-white illumination – and intensifying observed radiation levels. As such, the intensity of the core’s fission events is directly related to the intensity of its generated Cherenkov radiation. For a closer inspection of a core’s main features and processes, check out the ‘Inside a nuclear reactor’ boxout below. Inside a…

3 min
building demolition

Modern building demolition is an exquisitely choreographed dance of destruction. Dynamite-triggered ‘implosions’ – where a building collapses in on itself just like a crumbling house of cards – are so violently beautiful that they have even become a spectator sport. Demolition junkies are known to camouflage themselves as shrubs just to get a close-up shot of the carnage. Blowing up a building is easy, minimising damage to nearby structures is the tricky part. There are tumbling walls and flying debris to worry about, not to mention the earthquake-like vibrations produced by millions of tons of crashing cement and steel. The explosives alone can produce high-pressure shockwaves that shatter windows for miles. Demolition experts are called blasters (‘explosives engineer’ lacks a certain punch). They know that the most powerful force on a demolition…

1 min
how chemicals power batteries

Batteries are everywhere – in your car, your computer and even your cooker. While some are rechargeable and some are disposable, they all work on the same basic principle. A battery has two poles labelled + and –. They provide more than a handy guide as to which way up the battery goes in your TV remote. Electrons are produced inside the battery and when it’s inert they stay on the negative end. Connect the negative and positive ends with the heads inside a battery compartment and the electrons move to the positive end, producing electrical power. But where do those electrons come from? The reaction of substances inside the battery produces them. Common elements used are nickel and cadmium, but zinc is also popular. The battery ‘plates’ are each made up…