Card Set Information
Science Test Unit D. Chapter 3
Unit D chapter 3
A _________________ is an instrument used to observe distant objects.
A day is the time it takes Earth to make one _____________________.
A ______________ is a burning ball of gases.
A ________________ is a space object made of ice, dust, and gases.
A year is the time it takes Earth to make one ____________________.
The path a planet takes around the sun is its ______________.
An _____________ is a rocky object that orbits the sun in a path between Mars and Jupiter.
A __________________ is a group of planets and their moons that orbits a central star.
Any object orbiting another object is a _______________________.
The four planets nearest the sun are called the _____________________.
An ________________ is an imaginary line around which a planet rotates.
The five planets that are farthest from the sun are called the________________.
The moon seems to have different _____________________ as it orbits around the Earth.
A ________________________ is a vehicle sent into space in order to explore places too dangerous or too far away for people to visit.
A large object that moves around a star is a _______________.
Planets that are large spheres made up mostly of gases are called _________________________.
Name the inner planets
Mercury Venus Earth and Mars
Name the outer planets
Jupiter, Saturn, Uranus, Neptune, and Pluto
Name the planets in order from the sun
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto
Compare planets, comets and asteroids
They all revolve around the sun