When we look at the moon, the light that we see is actually the light of the sun reflected by the moon. Half of the moon is always in sunlight and half is always in darkness. Even though half of the moon stays lit, or illuminated, by the sun, the moon appears to have different shapes on different nights. These shapes are called phases. Different phases occur because we see different amounts of the lighted half of the moon on different days. The more of the illuminated side of the moon we see, the larger the moon appears to be. The less of the illuminated side of the moon we see, the smaller the moon appears. For example, during the full moon phase, all of the lighted part of the moon is seen from Earth and the moon appears fully lit. During the new moon phase, when the whole moon appears very dark, only the non-lit part of the moon is visible to Earth. The names of all the phases of the moon are shown below.

These moon phases occur in a highly predictable pattern. New moon is always followed by waxing crescent, then first quarter, then waxing gibbous, then full moon, then waning gibbous, then third (or last) quarter, then waning crescent, then back to new moon. Then the cycle repeats. This cycle of phases of the moon are caused by the Moon’s revolution around the Earth. One complete cycle of moon phases takes 29.5 days, or one month (think “moon-th”).

In order to receive full credit, please record your answers in full sentences. Do not forget to number your responses.

1. Which two dates from the chart above would have nights with a full moon?

2. Halloween night 2020 had a full moon. Does this mean that the entire moon was lit by the sun on that night? Explain your answer.

(4 points)
10000 Word Limit
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page 7 of 7When we look at the moon, the light that we see is actually the light of the sun reflected by the moon. Half of the moon is always in sunlight and half is always in darkness. Even though half of the moon stays lit, or illuminated, by the sun, the moon appears to have different shapes on different nights. These shapes are called phases. Different phases occur because we see different amounts of the lighted half of the moon on different days. The more of the illuminated side of the moon we see, the larger the moon appears to be. The less of the illuminated side of the moon we see, the smaller the moon appears. For example, during the full moon phase, all of the lighted part of the moon is seen from Earth and the moon appears fully lit. During the new moon phase, when the whole moon appears very dark, only the non-lit part of the moon is visible to Earth. The names of all the phases of the moon are shown below.

These moon phases occur in a highly predictable pattern. New moon is always followed by waxing crescent, then first quarter, then waxing gibbous, then full moon, then waning gibbous, then third (or last) quarter, then waning crescent, then back to new moon. Then the cycle repeats. This cycle of phases of the moon are caused by the Moon’s revolution around the Earth. One complete cycle of moon phases takes 29.5 days, or one month (think “moon-th”).

In order to receive full credit, please record your answers in full sentences. Do not forget to number your responses.

1. Which two dates from the chart above would have nights with a full moon?

2. Halloween night 2020 had a full moon. Does this mean that the entire moon was lit by the sun on that night? Explain your answer.

(4 points)
10000 Word Limit
Skip to navigation

page 7 of 7

1 answer

  1. The two dates from the chart that would have nights with a full moon are not provided in the text, but it can be inferred that full moon phases are mentioned as part of the moon's predictable cycle. For the purpose of answering this question accurately, I would need the specific dates from the referenced chart to identify which two corresponded to a full moon.

  2. Yes, Halloween night 2020 did indeed have a full moon, which means that the entire moon visible from Earth was lit by the sun on that night. During a full moon, the planet Earth is positioned between the sun and the moon, allowing us to see the fully illuminated side of the moon. Therefore, all of the moon’s surface that is facing the Earth was reflecting sunlight, making it appear completely bright and round.