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How Ramps, Wedges, and Screws Work
Jim Mezzanotte
出版Gareth Stevens, 2007
主題Juvenile Nonfiction / GeneralJuvenile Nonfiction / Readers / BeginnerJuvenile Nonfiction / Technology / How Things Work-Are MadeJuvenile Nonfiction / Technology / Machinery & ToolsJuvenile Nonfiction / Science & Nature / Physics
ISBN08368734919780836873498
URLhttp://books.google.com.hk/books?id=jfbsjEWtHacC&hl=&source=gbs_api
EBookSAMPLE
註釋Forces and motion are key concepts in the elementary science curriculum. How Simple Machines Work uses easy-to-read text and full-color photographs to help young readers understand the principles behind simple machines. Each volume includes three diagrams to enhance understanding. The text has been vetted by a science curriculum consultant and a reading consultant, allowing students to build reading skills as well as their knowledge of science concepts.