An investigative title offering an introduction to a different natural resource. Explores questions such as what they are, where they come from and how we use them in everyday life. Inlcudes suggested classroom and playground activities help to reinforce the key concept.An investigative title offering an introduction to a different natural resource. Explores questions such as what they are, where they come from and how we use them in everyday life. Inlcudes suggested classroom and playground activities help to reinforce the key concept.