Check the facts * Test your knowledge * Raise your grade * KS3 Bitesize Revision Check and Test Science tells you exactly what you must know to raise your grade and tackle your KS3 National Test with confidence. It: * is divided into the 100 essential things you need to know, so your revision is quick and simple * provides a quick test for each bite-sized chunk so you know you know it * Use the book either on its own or alongside the KS3 Bitesize website and TV programmes. * Science covers key topics in Physics, Chemistry and Biology.