Show:
Earth
Sun
Moon
Seasons
Misc. Vocab
100
This is the number of rotations that the Earth makes for each revolution.
What is 365?
100
This is the direction that the Sun rotates.
What is west to east?
100
This is how many times the moon orbits the Earth each time the Earth orbits the sun.
What is 12?
100
During this season, the northern hemisphere is tilted toward the sun.
What is summer?
100
This is an instrument used to show the time of day by casting a shadow on a horizontal plate.
What is a sundial?
200
The volume of the Earth is this many times the volume of the moon.
What is 50?
200
This is the kind of sunlight that reaches the Earth at angles greater than 45 degrees from the horizon.
What is direct sunlight?
200
This is what our moon is considered.
What is a natural satellite?
200
This is the moment when the Earth's axis is inclined at its maximum towards or away from the sun. (June 21 and Dec. 21)
What is solstice?
200
This is an object that measures the sun's altitude by the length of its shadow and serves as an indicator of the hour of the day.
What is a gnomon?
300
The Earth's rate of rotation.
What is 1000 miles per hour?
300
The Sun does not move across the sky every day. It appears to do so because of this.
What is Earth's rotation?
300
These were the farthest trips made by humans into space.
What are the Apollo Moon Missions?
300
This is the moment when the Sun crosses the celestial equator and the night and day are of equal length.
What is the equinox?
300
this is an imaginary line that runs through the two poles around which the Earth rotates.
What is an axis?
400
This is the direction that the Earth rotates and revolves.
What is counterclockwise?
400
This is the sunlight that reaches the surface of the Earth at angles less than 45 degrees to the horizon.
What is indirect sunlight?
400
This is how many times the moon orbits the Earth each month.
What is once?
400
The dramatic weather changes that we see are caused by this.
What is the tilt of the Earth's axis?
400
This means to orbit around the sun.
What is revolution?
500
The diameter of the Earth.
What is 8,000 miles?
500
These are the kind of shadows that the sun makes when it is high in the sky.
What is short?
500
The distance from the Earth to the Moon.
What is 239,000 miles?
500
These are the two factors that control our annual cycle of seasons.
What are the length of daylight and the concentration of the rays hitting Earth?
500
This is the action of turning about on an axis.
What is rotation?