FIRST CONTACTS 28000 BCE 1821 CE
PRE COLUMBIAN AMERICA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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terraced farming
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aqueducts
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Machu Picchu
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quarried stone
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Detailed explanation-1: -Gravity and the natural slope of the land allowed aqueducts to channel water from a freshwater source, such as a lake or spring, to a city.
Detailed explanation-2: -Aqueducts moved water through gravity alone, along a slight overall downward gradient within conduits of stone, brick, concrete or lead; the steeper the gradient, the faster the flow.
Detailed explanation-3: -Roman Aqueducts Were Built with Stone, Brick and Volcanic Cement. Romans built aqueducts and other constructions using a mixture of stone, brick and a volcanic cement known as pozzolana, that held it all together in place.
Detailed explanation-4: -Engineers have built aqueducts, or canals, to move water, sometimes many hundreds of miles. Actually, aqueducts aren’t a high-tech modern invention-the ancient Romans had aqueducts to bring water from the mountains above Rome, Italy to the city.