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Answer Key
Grade 8 Science: Earth, Solar System & Universe Scale
1.
third
2.
star
3.
gravity
4.
Earth
5.
moon
6.
Jupiter
7.
gas giants
8.
distance
9.
third planet from the Sun, in the habitable zone with liquid water
10.
Earth rotates on its axis once about every 24 hours
11.
tilt of Earth's axis as it revolves around the Sun, changing sunlight angle and daylight length
12.
distance light travels in one year; used because space distances are enormous
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