Humanity’s impact on the natural world can have disastrous effects. Invasive Species shines a light on the global problem of invasive species. With abundant charts and diagrams and large-format photos, this title explores the science behind how species become invasive and the damages they cause ecosystems around the world, and considers actions people and governments can take to try to improve the situation. Features include a flow chart showing the disaster’s causes and effects, a glossary, references, websites, source notes, and an index. Aligned to Common Core Standards and correlated to state standards.
This title introduces young readers to pearls, the gem formed inside the shell of an oyster! Learn how pearls are formed and where they are found. Historic and modern collection methods are detailed, both natural and cultivated. The use of pearls as a gemstone is examined including different colors. See how artisans and lapidaries create beautiful and useful jewelry with this beautiful gem. Finally, a list of tools and tips will set young rock hounds up to unearth their own treasures. Glossary words in bold, an index, and phonetic spellings for those hard-to-pronounce geologic terms enhance and supplement the text. Aligned to Common Core Standards and correlated to state standards.