Front

What is the Earth's axis?

Back

An imaginary line through the center of the Earth through its poles.

Front

What causes the seasons?

Back

The revolution of the Earth around the Sun.

Front

About how many days does it take the moon to go from one full moon to the next full moon?

Back

29.5 days (about 30 days or one month).

Front

How often does the moon orbit the Earth?

Back

27 days.

Front

What is the best definition of 'down'?

Back

The direction towards the center of the Earth.

Front

What is the Earth's rotation?

Back

The spinning of the Earth on its axis, which takes about 24 hours.

Front

What is the difference between rotation and revolution?

Back

Rotation is the spinning of the Earth on its axis; revolution is the movement of the Earth around the Sun.

Front

What is a lunar cycle?

Back

The cycle of phases of the moon, which takes about 29.5 days.

Front

What is gravity?

Back

A force that pulls objects toward each other, such as the Earth pulling us down.

Front

What is the significance of the equator?

Back

The equator is an imaginary line that divides the Earth into the Northern and Southern Hemispheres.