As seen in the sky from here on Earth, at the instant when the Moon is 90° west of the Sun, it is at the phase. At that time, it looks like exactly of the Moon is lit up.

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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As seen in the sky from here on Earth, at the instant when the Moon is 90° west of
the Sun, it is at the
phase.
At that time, it looks like exactly
of the Moon is lit up.
Transcribed Image Text:As seen in the sky from here on Earth, at the instant when the Moon is 90° west of the Sun, it is at the phase. At that time, it looks like exactly of the Moon is lit up.
Expert Solution
Step 1: Introduce the concepts

The Moon's morphing forms observed from Earth are known as the phases. The Moon only shines when it reflects the light from the sun due to the fact that our moon does not produce its own light.  The Moon's phases are a result of the Moon, Earth, and Sun's shifting locations.

Many civilizations all around the world place great importance on the Moon's phases. For instance, many farmers sow and harvest their crops in accordance with the phases of the moon. In order to determine spiritual celebrations and holidays, the Moon phases are also employed.


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