50% of its surface at all times. But which 50% keeps changing.
The side facing the sun is lit up.
the sun
Phase 1 - New Moon - The side of the moon that is facing the Earth is not lit up by the sun. At this time the moon is not visible.Phase 2 - Waxing Crescent - A small part (less than 1/2) of the moon is lit up at this point. The part that is lit up is slowly getting bigger.Phase 3 - First Quarter - One half of the moon is lit up by the sun at this point. The part that is lit up is slowly getting bigger.Phase 4 - Waxing Gibbous - At this time half of the moon is lit up. The part that is lit is slowly getting bigger. Waxing means to slowly get bigger.Phase 5 - Full Moon - The side of the moon that is lit up by the sun is facing the Earth. The entire moon is lit up at this point.Phase 6 - Waning Gibbous - The moon is not quite lit up all the way by sunlight. The part of the moon this is lit is slowly getting smaller. Waning means to slowly get smaller.Phase 7 - Last Quarter - Half of the moon is lit up but the sun. The part that we can see lit up is slowly getting smaller.Phase 8 - Waning Crescent - A small part of the moon is lit up at this point. It is getting smaller by the minute.
crescent
its the refraction of light from the sun. it appears full when the earth is not casting a shadow and blocking the sun from illuminating the moon.
The side facing the sun is lit up.
yes half the moon is lit up by the sun
if it is a full moon, then yes.
the sun
Phase 1 - New Moon - The side of the moon that is facing the Earth is not lit up by the sun. At this time the moon is not visible.Phase 2 - Waxing Crescent - A small part (less than 1/2) of the moon is lit up at this point. The part that is lit up is slowly getting bigger.Phase 3 - First Quarter - One half of the moon is lit up by the sun at this point. The part that is lit up is slowly getting bigger.Phase 4 - Waxing Gibbous - At this time half of the moon is lit up. The part that is lit is slowly getting bigger. Waxing means to slowly get bigger.Phase 5 - Full Moon - The side of the moon that is lit up by the sun is facing the Earth. The entire moon is lit up at this point.Phase 6 - Waning Gibbous - The moon is not quite lit up all the way by sunlight. The part of the moon this is lit is slowly getting smaller. Waning means to slowly get smaller.Phase 7 - Last Quarter - Half of the moon is lit up but the sun. The part that we can see lit up is slowly getting smaller.Phase 8 - Waning Crescent - A small part of the moon is lit up at this point. It is getting smaller by the minute.
Nothing is happening on the moon when it lights up. The moon is illuminated by the sun, but only the half that faces the sun.
That would be a cresent moon.
That would be a cresent moon.
That would be a cresent moon.
That would be a cresent moon.
That would be a cresent moon.
the answer is the sun