Includes index and glossary. "Internet-linked" --Cover. First published by Usborne, London.

What is science? -- What scientists do -- Our Universe -- What is the Earth made of? -- The seasons -- Weather -- Living things -- Cells -- Plants -- Animals -- Your body -- Bones and muscles -- What happens to food? -- Your brain and senses -- Atoms and molecules -- Solids, liquids and gases -- How materials change -- Engery -- Forces -- Hot and cold -- Gravity -- Floating -- Friction --Magnets -- Light and color -- Sound -- Electricity -- Computers -- Science words.