Moon

Front

What are the primary surface features of the Moon a result of?

Back

Solid bodies impacting the surface.

Front

What does the 'violent-birth' hypothesis state about the formation of the Moon?

Back

A Mars-sized planet called Theia impacted Earth, sending debris into space that eventually formed the Moon.

Front

What are the mountainous, cratered areas of lighter color on the Moon called?

Back

Highlands.

Front

What is the name of the moon phase characterized by a decreasing illuminated portion?

Back

Waning crescent.

Front

What type of tide occurs during a full moon?

Back

Spring tide.

Front

What are the dark, flat areas on the Moon's surface called?

Back

Maria.

Front

What is the term for the gravitational pull of the Moon that causes tides on Earth?

Back

Lunar gravity.

Front

What is the difference between spring tides and neap tides?

Back

Spring tides occur during full and new moons, while neap tides occur during the first and third quarters of the moon.

Front

What is the significance of the Moon's highlands?

Back

They are the oldest areas of the Moon's surface.

Front

What is the term for the bright streaks that radiate from some craters on the Moon?

Back

Rays.