Unit 7 Vocab Quiz 1

Which of the following words has this definition:

real or imaginary line through the center of an object

• probe

• axis

• orbit

• atmosphere

Which of the following words has this definition:

a blanket of gas surrounding a planet

• debris

• astronomer

• billion

• atmosphere

Which of the following words has this definition:

fly or move around in a circle

• rotate

• orbit

• galaxy

• satellites

Which of the following words has this definition:

the surface of the land and its features

• terrain

• debris

• frigid

• probe

Which of the following words has this definition:

natural or man-made objects that orbit around another planet or other celestial objects

• axis

• billion

• atmosphere

• satellites

Which of the following words has this definition:

a tool used to explore something, such as outer space

• probe

• orbit

• astronomer

• rotate

Which of the following words has this definition:

extremely cold

• debris

• terrain

• frigid

• rotate

Which of the following words has this definition:

a very large cluster of billions of stars, dust, and gas held together by gravity and separated from other star systems by a large amount of space

• satellites

• debris

• probe

• galaxy

Which of the following words has this definition:

a scientist who studies stars, planets and outer space

• astronomer

• axis

• frigid

• billion

Which of the following words has this definition:

a very large number

• galaxy

• billion

• terrain

• debris