Great Wall of China

True or false: The Great Wall is one long wall that spans 100,000 miles.

• True
• False

Which emperor first consolidated the many walls into what became known as the "Long Wall"?

• Emperor Qianglong
• Emperor Qin Shi Huang
• Emperor Han Wudi

How did soldiers communicate between watchtowers along the Great Wall?

• Smoke and fire signals
• Hand gestures and gongs
• Flag waving and horns

What different materials was the Wall made from?

• Terracotta
• Gravel and sand
• Rammed earth and bricks made in kilns

True or false: The Great Wall is the only visible man-made structure in space.

• True
• False