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1_______. Before the third century BC there were lots of smaller walls and these were joined together to make one long. The work was done by enormous gangs of forced labourers and many of them died doing the work. 2___________. It is made of earth covered with stone.
3___________. The stone structures were usually tombs for pharaohs. The pyramids have square bases with sloping sides which meet at an apex. The first pyramid was built in about 2600 BC and is over 140m high. 4___________. It is estimated that 20-25,000 people worked for 20 years to build each pyramid.
The Great Wall of China was built across northern China to protect the population.
The wall is over 2000 km long, 3.5m high, and 4.5m wide at the top.
The Egyptian pyramids are famous symbol of ancient Egypt.
One of the biggest pyramids is made of enormous stone blocks which weigh up to 200 tonnes each.
