Every living thing on the Earth depends on water. Animals need water to drink. They may eat other animals or plants, and these also need water to survive and grow. Even plants and animals that live in desert regions, where rain rarely falls, need the tiny amounts of water vapour in the atmosphere to survive.
What does energy come from? All energy comes from the Sun. The Sun's energy changes into other kinds of energy when it reaches the Earth. The Sun's energy is even in coal and oil. Long ago, the Sun gave its energy to plants and animals. When they died, their bodies slowly turned into oil and coal over millions of years. Power stations then change the energy in coal and oil into electrical energ…
The contents are Electricity all around; inside the battery; what is static electricity; electricity in your home; wlong the wire; wiring in the home; measuring in volts; heatingup; switching on and off; making electricity safe; generating electricity; distributing electricity; living without electricity
This book explain about colour and white light; coloured objects; infra-red rays; glowing int the dark; atoms and light; refraction; images of light; looking through telecopes; the speed of light; making shadows; the human eye;........