AMERICAN LANGUAGE HUB_Level2_Student'sBook_Answerkey.pdf
9 core technologies
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2. TECHNOLOGY The application of knowledge, tools, and skills to solve practical problems and extend human capabilities.
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6. Optical Technology The technology of producing light; controlling light; using light for information collection, processing, storage, retrieval, and communication, and using light to do work.
16. Microscopes Lasers Fiber Optics Telescopes Light bulbs Compact Disk DVD
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19. Legs on a table or chair Roadways Bridges Buildings Swimming pools Water tower Airplane wing Storm drain/sewers
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22. Brakes on a bike Peddle and gears on a bike Skateboard wheels Simple Machines Gears Linkages-Car transmission Pencil sharpener Transportation Methods