The Moon travels across the sky in the same direction as the Sun; Its' leading edge is the point at which phase changes start and move from right to left.
The dividing line between light and shadow across the moon's disk is called the terminator. This is the line that separates the illuminated side of the moon from the dark side.
A shadow is caused when there is less light or no light in an area. An object can block the light and thereby cause a shadow. If the light reflecting off the moon is a source of light, objects blocking this light can cause a shadow.
The moon hasn't got any light of itself, it can only reflect sunlight. When the Earth gets beween the Moon and the Sun, the Earth will cast a shadow on the Moon. Phases of the Moon happens as the Earth's shadow move across the Moon's surface.
(Answered as "What travels across the surface of the Earth when an eclipse occurs?") The shadow of the Moon travels across the Earth during a Solar Eclipse. (During a Lunar Eclipse, the shadow of the Earth travels across the Moon.)
The shadow is caused by the earth blocking the path of the light from the sun casting shadow on the moon. When the earth is not in between the sun and the moon then we have a "full moon."
The phenomenon of the moon casting its shadow on Earth is called a lunar eclipse. This occurs when the Earth passes in between the Sun and the Moon, causing the Moon to move into Earth's shadow.
During a solar eclipse, it is the shadow of the moon that travels across part of the Earth as it passes between the Earth and the Sun. This creates the phenomenon where the moon blocks the sunlight from reaching the Earth's surface, causing a temporary darkness known as the eclipse.
the position of the moon in relativity to the sun and earth....the angle casts a shadow across the moon
The shadow of the moon moves from west to east across the Earth during a solar eclipse. This occurs because the Earth rotates from west to east, causing the shadow created by the moon to travel in that direction as it crosses the surface. As a result, observers in the path of the eclipse see the shadow move across the landscape in the same west-to-east direction.
The sun reflects light off of the moon and what we see is the shadow of that reflection on the moon.
the proximity of the earth, moon, and sun. The moon reflects the light of the sun, but it can't do that if it's in the earth's shadow, or partly in the earth's shadow.
the position of the moon in relativity to the sun and earth....the angle casts a shadow across the moon