What shape is the Earth considered?

Which of the moon's layers is about 35 miles thick on one side and 90 miles thick on the other side?

Which of the moon's layers is probably solid and iron rich?

Which moon phase occurs when only a sliver of the right side is visible?

Which moon phase occurs right before full moon -- an egg shape is lit up on the right side?

Which moon phase occurs right after full moon when an egg shape is lit up on the left side?

Which moon phase occurs when only a sliver of the left side in visible?

Which moon phase occurs when the moon is completely in shadow?

Which moon phase occurs when the right half of the moon is visible?

Which moon phase occurs when the left half of the moon is visible?

Which moon phase occurs when all of the moon's surface facing Earth is lit?

Which eclipse occurs with the alignment S-M-E?

What percent of Earth's water is salted?

What is the average distance from the sun to the earth?

What is the term that refers to when Earth is closest to the sun in his revolution?

What month does the Northern Hemisphere's spring equinox occur?

What is the term that refers to when Earth is farthest from the sun in his revolution?

During what type of eclipse did Aristotle disprove that the Earth is flat?

What month is the Southern Hemisphere's Spring Equinox?

How long does one revolution of the moon take?

What eclipse occurs at the alignment S-E-M?

During the Southern Hemisphere's summer solstice the sun shines directly on what part of Earth?

Day and night are caused by what?

What is the line that divides the Earth into the Northern and Southern Hemisphere?

What is the shape of Earth's orbit?

What is the movement of Earth around the Sun?

In what month is Earth closest to the Sun?

In which event does the sun shine directly on the equator?

Which event occurs when the sun reaches its farthest point North or South of the equator?

During the Northern Hemisphere's Summer Solstice, the sun shines directly on what part?

During the Winter Solstice, how many hours of dark is there?

What is another name for lunar dirt?

What is the glowing part of the Sun seen during a Solar eclipse?

What are the areas of lighter colored crust on the Moon?

What is the dark part of an eclipse shadow called?

In order to experience a total solar eclipse, you must be in what part of the shadow?

The gravity on Earth is how many times greater than that of the moon?

What are dark colored lava plains with circular basins on the moon?