Moon

Front

What are rays on the Moon?

Back

Long, light streaks of pulverized rock radiating outward from newer craters.

Front

What occurs during a solar eclipse?

Back

The Moon passes between the Sun and the Earth, blocking our view of the Sun.

Front

What is the umbra?

Back

The part of the shadow where a total lunar eclipse is experienced.

Front

What is apogee?

Back

The point in the orbit of the Moon where it is farthest from the Earth.

Front

What is a spring tide?

Back

A type of tide that occurs during the new moon and full moon phases, when the gravitational forces of the Moon and Sun align.

Front

What is a neap tide?

Back

A type of tide that occurs during the first and third quarter moon phases, when the gravitational forces of the Moon and Sun are perpendicular.

Front

What is tidal locking?

Back

The phenomenon where the Moon rotates on its axis in the same time it takes to orbit the Earth, resulting in the same side always facing Earth.

Front

What is the ecliptic?

Back

The apparent path of the Sun across the sky, which the Moon also follows in its orbit.

Front

What is perigee?

Back

The point in the orbit of the Moon where it is closest to the Earth.

Front

What is a lunar eclipse?

Back

An event that occurs when the Earth passes between the Sun and the Moon, causing the Earth's shadow to fall on the Moon.