Clocks Eureka! CKLA 4th Grade, Unit 4

Who built a sophisticated water clock in the eleventh century?

• Orville Wright
• Otto Lilienthal
• Su Song
• Leonardo da Vinci

What did television stations need clocks for?

• To count the number of viewers
• To regulate the temperature in the studio
• To schedule their programming
• To measure the size of a show

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What innovation followed sundials in timekeeping?

• Hourglasses
• Water clocks
• Pendulum clocks
• Digital clocks

What was the limitation of sundials?

• They required constant maintenance
• They were useless on cloudy days or at night
• They could only be used indoors
• They were inaccurate

What did bosses benefit from, thanks to clocks?

• They could plan and assign work knowing when employees would arrive and leave
• They had no benefits from clocks
• They could plan work without knowing when employees would arrive
• They could avoid work assignments

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How did prehistoric people track time?

• By measuring with water clocks
• By using clocks
• By noting changes in weather
• By counting seconds

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What industries heavily relied on schedules made possible by clocks?

• Textiles
• Agriculture
• Railroads and airlines
• Automobiles

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How did people divide the day as they began interacting more?

• Into ten hours
• Into twenty-four hours
• Into twelve hours
• Into five hours

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What did sundials use to tell time?

• Wind direction
• Direction and size of shadows cast by the sun
• Temperature changes
• Moon phases

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How did clocks aid coordination among people?

• By limiting communication
• By slowing down activities
• By creating a shared understanding of time
• By causing confusion

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