This superbly illustrated Question & Answer book answers more than 70 questions to help you understand key subject areas. Discover how much the Earth weighs, what starts an avalanche, why the sky is blue, plus many more exciting facts. Test your friends and impress them with your knowledge using the challenging quiz pages, and learn exciting new facts in the easy-to-use fact panels. Accurate illustrations and photographs create a visual factfinder packed with essential information on the forces and activity that shape our planet.
