Question

write about sand clock​

Answer 1

Answer:

it is made of sand in desert so it is named as sand clock

Answer 2

Answer:

An hourglass (or sandglass, sand timer, sand clock or egg timer) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance (historically sand) from the upper bulb to the lower one.

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