The Clock

Who started using water clocks around 1400 BCE?

• The Greeks

• The Romans

• The Egyptians

• The Chinese

What powered Su Song's clock?

• A battery

• A waterwheel

• A pendulum

• A spring

What was the height of the structure mentioned in the text?

• Thirty feet

• Forty feet

• Fifty feet

• Sixty feet

How many doors did the puppets emerge from?

• Three

• Four

• Five

• Six

For how long were water clocks like Su Song's considered the most accurate timepieces?

• Dozens of years

• Hundreds of years

• Thousands of years

• Tens of years

What replaced water power in clocks as they became more accurate?

• Springs and pendulums

• Electricity

• Solar power

• Wind power

What often led to shipwrecks or ships becoming lost at sea?

• Bad weather

• Lack of food

• Not knowing longitude

• Pirates

What did John Harrison's inventions help sailors do?

• Cook food

• Navigate safely

• Communicate with others

• Fish

What would not have been possible without clocks according to the text?

• Railroads and airlines

• Parks and gardens

• Schools and libraries

• Shops and markets

How did clocks affect railroads and airlines?

• They allowed them to operate on schedules

• They made them slower

• They made them more expensive

• They made them less popular.