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Sun
Solar System
Moon
Earth
Atmosphere
100
Earth's sun is this size.
What is average size?
100
These are the five most common celestial members of our Solar System.
What are the sun, planets, comets, moons and asteroids?
100
We see different phases of the moon because of this.
What is reflected light from sun?
100
This causes the length of one day of Earth to be 24 hours.
What is the Rotation of the Earth?
100
A thin layer surrounding the Earth.
What is the atmosphere?
200
An object that is a million times larger than Earth.
What is the sun?
200
Earth's orbit is this shape.
What is nearly circular?
200
Earth orbits the sun while the moon orbits this.
What is Earth?
200
Earth's rotation causes the sun and moon to appear here.
What is the eastern horizon?
200
The 4 main gases in the atmosphere.
What are nitrogen, oxygen, carbon dioxide and water vapor?
300
These objects are like the sun, but appear as just points of light in the sky.
What are stars?
300
This is the force that keeps the planets in orbit around the sun.
What is gravity?
300
These result from seeing different portions of the lighted area of the moon's surface.
What are phases of the moon?
300
Earth's revolution around the sun defines the length of a year as this many days.
What is 365 1/4?
300
The troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
What are the layers in the atmospere?
400
There is a vast distance between these objects.
What are stars?
400
The regular and predictable motions in the solar system explain these 7 things.
What is a day, a year, phases of the moon, eclipses, tides, meteor showers and comets?
400
The phases of this object reapeat in a cyclic pattern about once per month.
What is the moon?
400
These two things cause the seasons.
What are revolution and tilt of the Earth?
400
Nearly all weather occurs in the lowest layer of the atmospere, called
What is the troposphere?
500
These two objects are the major bodies in the solar system.
What are the sun and planets?
500
These 2 things are based on celestial observations.
What are time and the coordinate sysetem?
500
The apparent motions of the sun, moon, planets and stars arcoss the sky can be explained by these 2 things.
What is Earth's rotation and revolution?
500
The length of daylight depends on these two things.
What is latitude and season?
500
As altitude increases air pressure does this.
What is decreases?