Question 1 (30 points)
Match the terms to the definition.
Mercury, Venus, Earth,
Mars. Terrestrial, rocky.
1.
Big Bang
A force of attraction that
keeps plakets orbiting the
2.
Doppler Effect
sun.
The spinning of a planet
3.
Nebula
く
on its axis, causing day
and night.
4.
Solar System
Huge clusters of stars, gas,
く
5.
Geocentric theory
and dust bound by the