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Great Wall of China

Topic: 5E Earth, Sun and Moon

Scientists are to carry out the first detailed survey of the Great Wall of China to establish just how long the ancient barricade is. The wall, the world's largest man-made structure, is estimated at over 5,000 kilometres long. Along with checking its dimensions the four-year study, which starts in May 2007, will map the wall's exact route. In this activity children will test methods of measuring length and discuss their accuracy. They will use their findings to make a slideshow advising the scientists on the best method.

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