Question

collect pictures of the instruments used by our ancestor to determine time sndial : prepare their charts​

Answer 1

Prepare their charts and exhibit them in class. Expert created.

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Answer 2

Explanation:

sundial, the earliest type of timekeeping device, which indicates the time of day by the position of the shadow of some object exposed to the sun's rays. As the day progresses, the sun moves across the sky, causing the shadow of the object to move and indicating the passage of time