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Rachel Griffiths: Why Do Leaves Change Colour?

Скачать книгу (размер 75 Kb , формат fb2, страниц 16) Аннотация: A series of twenty non-fiction science readers which engages children in the world around them. Why are flowers different colours? How do we know how old a tree is? How can plants grow in deserts? You can find the answers to these and other questions about plants in Why Do Leaves Change Colour?

Rachel Griffiths: Why Do Bridges Arch?

Скачать книгу (размер 75 Kb , формат fb2, страниц 16) Аннотация: A series of twenty non-fiction science readers which engages children in the world around them. What holds up skyscrapers? Why are sports domes curved? Why are triangles used in many bridges? You can find the answers to these and other questions about structures in Why Do Bridges Arch?