Answer:
21 days
Explanation:
After another week (21 days after new moon) the moon has moved another quarter of the way around the Earth to the “third quarter phase”. The sun's light is now shining on the other half of the visible face of the moon
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usually this is the measuring device of amount of rain fall.
you can buy these, but most of the time meteorologists will have these to measure the amount of rain fall
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