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Crossword Puzzle
Crossword Puzzle

History of Clocks

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History of Clocks
 

Crossword Puzzle

History of ClocksOnline version

Complete the crossword after the brief review over the history of clocks.

by Ana Medina
1

One of the earliest shadow clocks.

2

Called a clepsydra, where the rising waters would keep time and eventually hit a mechanical bird that triggered an alarming whistle.

3

Object made of wax that with a measured rate of burn, was a means of determining the time at night.

4

From the 15th century onwards, they were used primarily to tell time while at sea. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated trickle of material, usually sand, from the upper bulb to the lower one.

5

Item you attatch to your wrist to tell the time.

6

Object that swings its weight, to regulate the timekeeping mechanism.

7

A timekeeping device that relies on a system of gears, springs, and/or weights to measure and display the passage of time without the use of electricity or electronic components.

8

A highly accurate clock based on the regular vibrations of a quartz crystal in an electrical circuit

9

They use a battery as its power source, typically a quartz crystal movement, to keep accurate time.

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