Wordly Wise G3 Lesson 10 - Susan Redmond | Library

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A cathedral is a large

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A cable is made of twisted strands of

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Which of these is a heating device?

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In history, a landmark is

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What might a farmer use to convey milk products?

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Which of these is a structure?

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Plastic-covered cables are used to carry

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Which of these carries freight?

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In a motor or machine, what is a shaft?

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Which of these is a San Francisco landmark?

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How might someone convey good wishes?

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A coal shaft is a

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Which of these are cooking methods?

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Which of these usually has a rod to hold it up?

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Which of these has a shaft?

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The subway and the elevator are two inventions that changed cities forever. Both_________________people quickly and safely to where they want to go.

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Elisha Otis built the first elevator in 1857. His invention made the skyscraper possible and is a____________________in human history.

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The world's tallest building, completed in 2010, is the 2,717-foot Burj Khalifa, in the United Arab Emirates. For hundreds of years, the record was held by the 528-foot____________________in Ulm, Germany

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Before 1857, the only way to get to a building's upper stories was by climbing stairs. Otis'_________________________was less tiring and could carry people to any height.

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The idea caught on, and soon skyscrapers were shooting up like mushrooms. Otis' elevator was the perfect______________________________for moving people up and down quickly and safely

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Otis was working in a factory that made beds when he got his idea. He saw how a hanging cage used for moving______________between floors could be made accident-proof.

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The idea behind Otis' invention is quite simple, If the_________________holding the elevator car breaks , then there should be some means of keeping it from dropping like a stone.

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Before the skyscraper, tall buildings like the one at Ulm were made of stone, The use of steel girders made possible_________________________Like Burj Khalifa

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It was unlikely that such a thing would happen. However, if it did, then steel___________________in the side of the elevator car would spring out to hold it in place.

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There were two rods, and they caught in slots designed to hold them and prevent further movement. The slots ran the whole length of the elevator_________________