Can you hold it in your hand? If so, it might be a solid.Things that are solid have a definite shape and size. Almost everything on Earth is one of three kinds of matter--a liquid, a solid, or a gas. Discover more about solids and matter in Solids. Each World Languages title includes access to ten eBooks in ten languages! Our language toggle bar allows you to easily switch between English, Arabic, French, German, Hindi, Korean, Mandarin, Russian, Spanish, and Tagalog with a simple click. The full audio feature allows readers to listen to the text in their own language as they flip through the book. World Languages works on all platforms, including standard desktops, tablets, and SMART Boards.