Question

The sundial was one of the first timekeeping devices created, and dates back to 1). Roman and Greek societies. It used a central 2)... rod, called a gnomon, and the sun's light to cast a shadow onto a platform which was marked to show the hours of the day. 2 The first clepsydra or water-clock was created around 500- 600BC. It was widely used in Egypt, Greece and the Arab world. The concept was quite simple and used the naturally consistent movement of water to 3) time. This was done by allowing water to 4)................ either in or out of a marked container. 3 By far the most modern device on this list, the atomic clock was developed in 1949. It is accurate to a couple of 5)..................over several million years, making it by far the most 6). timekeeping device to date The atomic clock is incredibly advanced. Amazingly, it uses the rotation of subatomic particles to measure the passing of time! 4 Commonly seen even today, the hourglass uses similar 7) to that of a clepsydra. It uses two glass bulbs, one above the other, with a small opening in between. The sand inside gradually falls from top to bottom, indicating that a(n) 8) amount of time has passed. It is believed that it was first created in the 8th century, although it only truly became popular around the 1300s. 5 Obelisks were the next logical step from the sundial, and used the same basic 9)....... They were towering pointed which cast a shadow across a large public area, similar to how a gnomon did. They made timekeeping easier for 10)..... which cast a shadow across a large public area, similar to how a gnomy did.

Answer 1

Ответ:

1) Roman and Greek societies.

2) metal rod.

3) measure.

4) flow.

5) milliseconds.

6) accurate.

7) principle.

8) specific.

9) principle.

10) people.

Объяснение: