Question

Write how time was calculated using sand clock​

Answer 1

Answer:

using the shadow and light of the sun

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.