Respuesta :
As the Moon orbits the Earth, it doesn't spin on its axis; the same part of the Moon always faces the sun, and as a result only that part is illuminated by the Sun, and therefore visible on Earth. The Moon's "phases" are caused by certain portions of the Moon's illuminated side being visible from Earth over time. During a Full Moon, the Moon is on the opposite side of Earth from the sun, and therefore all of it's illuminated surface is visible. During a New Moon, the Moon is between the Earth and Sun, and none of it's illuminated side is visible. Other stages of the Moon are Quarter, Gibbous, and Crescent (please see the diagram attached).

Hello There!
The different phases of the moon is caused by where the position of the moon is when orbiting around the Earth. Each day, there is a different angle of sunlight that is hitting the moon and that is what causes a reflection to appear on the moon
PHASES OF MOON
New Moon - This phase occurs when the moon is positioned between earth and the sun. We can not see the moon during this phase because you can not see the side that reflects the sun's light.
Waxing Crescent - The moon is less than half visible during this phase. It is expanding in light.
First Quarter - During this phase, the moon looks half lit but it's a quarter of a way its orbit of Earth.
Waxing Gibbous - During this phase, the moon is more than half full.
Full Moon - During this phase, the sun, the Earth, and the moon are aligned with each other nicely. During this stage, the moon is always on the opposite side of our planet.
Waning Gibbous - The moon is loosing light. It is decreasing.
Third - Quarter During this phase, the moon has completed 75% of its orbit and it appears half full.
Waning Crescent - The moon is less than half full. The light being reflected from the sun is getting smaller.