Download UNIT D CHAPTER 3 ~ OPEN BOOK TEST

UNIT D CHAPTER 3 ~ OPEN BOOK TEST
NAME ____________________________________ Date ________________
WORD BANK
Satellite
Orbit
Rotation
Solar system
planet
comet
outer planets
telescope
phases
revolution
axis
star
asteroid
inner planets
gas giants
space probe
1. A _____________________ is a group of planets and their moons that orbit a central
star.
2. Venus is a ____________________ that revolves around the sun.
3. An ____________________ is an imaginary line around which a planet rotates, or
spins.
4. Any object orbiting another object is a _________________________.
5. The four planets nearest the sun are called the _______________________.
6. An ________________________ is a rocky object that orbits the sun in a path
between Mars and Jupiter.
7. A ______________________ is a vehicle sent into space in order to explore places
too dangerous or too far away for people to visit.
8. The path a planet takes around the sun is its ______________________________.
9. A ________________________ is a burning ball of gases.
10. Neptune is one of the four __________________________.
11. A _______________________ is an instrument used to observe distant objects.
12. A ___________________________ is a space object made of ice, dust, and gases.
13. The five planets on the outer side of the asteroid belt are called the
____________________.
14. The moon seems to have different __________________________, or shapes, during
a cycle of about 28 days.
15. A year is the time it takes Earth to make one ______________________________.
16. A day is the time it takes Earth to make one _____________________________.