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What Objects Are Part of the Solar System? Pages 539-545

Horizontales
It's atmosphere is made up mostly of carbon dioxide.
The _____ in our solar system are very far from each other. 541
The distance from one side of the planet, through its center, to the other side 542
It has an atmosphere made of mostly nitrogen, oxygen, and carbon dioxide 543
In our solar system, the planets and other objects revolve around a star we call the _____. 540
The orbits of the planets in our solar system are not perfect circles. they are oval-shaped, or _____.
The _____ revolves once around Earth about every 27 days. 540
The Earth is the only planet known to have abundant liquid _____. 543
There are _____ planets in our solar system. 540
Venus and Mercury have no _____. 541
All planets in our solar system _____, or spin, about an axis. 540
Verticales
Mars has many _____. 543
Some objects don't _____ directly around the sun. 540
The inner planets are very _____ and rocky. 542
The smallest planet 542
Planets in our atmosphere can be classified based on their _____ from the sun. 542
The _____ planets are Mercury, Venus, Earth, and Mars.
Known as the "Red Planet" 543
The Earth rotates on its axis once every 24 _____. 540
An _____ is an imaginary line that goes through the center of a planet. 540