Solar System

1.

How do we see the planets?

ABecause they reflect light from the Sun
BBecause they glow with hot gasses
CBecause planets are so big
2.

What is the definition of a planet?

Aa massive object orbiting a star
Bthe sun and all of the objects in the solar system
Can object in orbit around another planet
3.

Who first proposed that the planets orbited the Sun?

APtolemy
BGalileo Galileo
CNicolaus Copernicus
4.

What two arguments did Galileo make to support the fact that the earth was not the center of the universe? (select two of the following)

BHe argued the phases of Venus could ot be explained if Earth were at the center of the planets.
DHe observed that there were four moons orbiting Jupiter, which showed not everything in the sky orbited around the earth
AHe argued that all objects in the solar system are bound by gravitational force to the Sun.
CHe argued that the orbits of planets are not true circles, but are ellipses.
5.

What is the solar system

BThe Sun and all objects that are bound by gravitational force to the Sun
6.

What keeps the solar system together?

Ainertia
Bgravitational force
7.

Which of the following are the inner planets?

AMercury, Venus, Earth, Mars
BJupiter, Saturn, Uranus, Neptune
CPluto, Venus, Neptune, Mercury
8.

Which of the following are the outer planets?

AMercury, Venus, Earth, Mars
BJupiter, Saturn, Uranus, Neptune
CPluto, Venus, Neptune, Mars