Show:
Earth
Sun
Moon
This and That
Vocabulary
100
What is the imaginary line from the North to South Pole called?
Axis
100
The word "solar" refers to this object.
What is the "sun"?
100
It takes this long for the moon to revolve completely around the Earth.
What is 29 days or about a month?
100
This keeps the Earth and moon in their orbits.
What is "gravity"?
100
This word describes the Earth spinning on its axis.
What is "rotating"?
200
The shape of the Earth
What is a "sphere"?
200
The sun is a big fiery ball of gas called this.
What is a "star"?
200
Solar refers to the sun. This term refers to the moon.
What is "lunar"?
200
It takes this long for the Earth to complete on full rotation.
What is 24 hours?
200
This imaginary line goes from the North Pole to the South Pole of the Earth.
What is the "axis"?
300
The Earth takes this long to revolve around the sun.
What is 365 1/4 days?
300
The sun rises in this direction.
What is the "east"?
300
This is a valley, fault, or canyon on the moon.
Rill
300
This object is used to study far away objects in the sky.
What is a "telescope"?
300
Why does Earth have fewer craters than the moon?
Earth's atmosphere
400
How long does it take the Earth to make a full rotation?
24 Hours (a day)
400
The sun sets from this direction.
West
400
What causes craters?
What are meteors or asteroids.
400
What what time(s) are shadows the longest?
Sunrise and sunset
400
How many Earths could fit inside the sun.
Over a million.
500
The imaginary line horizontally around the middle of the Earth.
What is the "equator"?
500
At what time are shadows the shortest?
Around noon.
500
What are large, dark, basaltic plains formed by ancient volcanic eruptions. 
What are maria (mare).
500
We have this special day every 4 years in February because it takes the Earth 365 and 1/4 days to revolve around the sun.
What is "Leap Year Day"?
500
What does the sun revolve around?
The center of the galaxy/black hole