Match the terms to the definition.
Question 1 options:
The idea of that the Earth and planets orbit the sun. A sun-centered view.
Huge clusters of stars, gas, and dust bound by the force of gravity.
A group of objects that orbit a star.
Jupiter, Saturn, Uranus, Neptune. Gas giants.
The spinning of a planet on its axis, causing day and night.
The orbit of a planet around the sun. On Earth, one year.
Mercury, Venus, Earth, Mars. Terrestrial, rocky.
A force of attraction that keeps planets orbiting the sun.
A rock that has entered Earth's atmosphere, leaving a streak of light in the night sky.
The theory the universe came forth from a single spot in an enormous explosion.
1.
Big Bang
2.
Doppler Effect
3.
Nebula
4.
Solar System
5.
Geocentric theory
6.
Heliocentric theory
7.
Gravity
8.
Galaxy
9.
Rotation
10.
Revolution
11.
Inner planets
12.
Outer planets
13.
Meteor
14.
Meteorite
15.
Meteoroid
