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|
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4
|
The _____ planets are Mercury, Venus, Earth, and Mars
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6
|
In mass, Earth is the _____ biggest planet.
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7
|
What is the solar system that we live in called?
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8
|
Earth is the _____ biggest planet in size?
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9
|
The planets' orbits are _____.
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11
|
What is Pluto known as?
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13
|
The _____ is a huge storm on Jupiter.
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14
|
Which planet is the biggest in volume and mass?
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15
|
In distance from the Sun, the _____ is between Mars and Jupiter.
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19
|
A meteoroid that strikes the surface of a moon or planet is called a _____.
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21
|
What is a piece of rock similar to the material that is formed in planets called?
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22
|
Mars has _____ small moons.
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23
|
Saturn has a complex _____ system.
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24
|
Pluto is made up of _____ and rock.
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1
|
Uranus's axis of rotation is nearly _____ to plane of orbit.
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2
|
Neptune's _____ atmosphere causes its bluish-green color.
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3
|
Which planet is the closest to the Sun?
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5
|
The solar system formed from a piece of a _____ of gas, ice, and dust.
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7
|
What holds the solar system together?
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10
|
A _____ is composed of dust and rock particles mixed with frozen water, methane, and ammonia.
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12
|
The _____ planets are Jupiter, Saturn, Uranus, and Neptune.
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16
|
In the solar system, planets revolve around _____.
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|
17
|
Venus is _____ to Earth in size and mass.
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18
|
A meteoroid that burns up in Earth's atmosphere is called a _____.
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20
|
Nuclear fusion began when hydrogen atoms started to fuse and _____ energy.
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