What is an imaginary line extending from the North Pole to the South Pole going through the center of Earth, which is the center of Earth's rotation?

How many Moon phases are part of the lunar cycle?

What is responsible for the changing of seasons on Earth?

What Moon phase happens when the Moon lies between the Sun and Earth?

What causes the revolution of the planets?

What creates the night-and-day cycle experienced on Earth?

What happens when when the Sun, Earth, and Moon align so that the Earth blocks the Sun shining on the Moon; a solar eclipse or a lunar eclipse?

Name all four seasons.

What is the obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination?

What is caused by the pull of the Moon's gravity?

What causes our ocean tides?

What are the four natural divisions of the year based on changes in temperature due to varied amounts of sunlight called?

What causes a solar eclipse?