What is the term for the Moon’s phase when none of its surface is visible from Earth?

What are the dark regions on the Moon's surface, originally thought to be seas, called?

What phenomenon occurs when the Moon passes into the Earth's shadow?

How many days does it take for the Moon to complete one orbit around the Earth?

What is the light-colored, coarse-grained rock found in the lunar highlands called?

What is the primary cause of the Moon’s phases?

Which layer of the Moon is primarily responsible for volcanic activity in its past?

What is the Moon’s atmosphere primarily composed of?

How do scientists think the Moon was formed?

During which phase is the Moon half-illuminated and visible in the evening?

Why are there more visible craters on the Moon than on Earth?

What is the region on the Moon’s far side that is least visible from Earth called?

Which element is commonly found in the Moon’s surface rocks?