. . "Synthetic products Juvenile literature." . . "Materials." . . "Natural resources Juvenile literature." . . "JUVENILE NONFICTION / General" . . "Synthetic products." . . "JUVENILE NONFICTION / Technology / General" . . "Raw materials Juvenile literature." . . "Materials Juvenile literature." . . . . . . . . "¿Natural o artificial?" . . . "Natural or Man-Made?"@en . "Natural or man-made?" . . . . . . . . . "Discusses the differences between natural and man-made substances using examples such as limestone, an ingredient in some toothpastes." . . . . . . "Text promotes children's curiosity while building important science content knowledge. The interaction of text and photos supports and engages readers as they learn about the wonderful world around them. This book focuses on where things come from and how things are made." . . . "Electronic books"@en . "Electronic books" . . . "Intermediate readers distinguish between natural and man-made objects."@en . . "Juvenile works" . "Juvenile works"@en . . . . . . . . . . "Raw materials." . . "TECHNOLOGY & ENGINEERING Technical & Manufacturing Industries & Trades." . . "TECHNOLOGY & ENGINEERING Industrial Technology." . . "Natural resources." . . "TECHNOLOGY & ENGINEERING Industrial Engineering." . . "TECHNOLOGY & ENGINEERING Manufacturing." . .