Which theory explains how the Solar System was formed?

• Big Bang Theory

• Heliocentric Theory

• Modern Nebular Theory

• Geocentric Theory

The big bang states that the Universe began as a single point, then expanded and stretched to grow as large as it is right now.

• True

• False

How old is the Universe?

• 8-10 billion years ago.

• 12-14 billion years ago.

• 13-14 billion years ago.

• 18-20 billion years ago.

There are more stars than planets in our galaxy.

• True

• False

A planet is characterized by:

(best answer)

• It is massive enough to be nearly spherical in shape and has no other large object in its orbital path.

• It has to orbit a star.

• It has no other large object in its orbital path.

• It has to orbit a star, it is massive enough to be nearly spherical in shape, and has no other large object in its orbital path.

Which are the four inner planets of the Solar System?

• Mercury, Earth, Saturn, and Neptune

• Mercury, Venus, Earth, and Mars

• Venus, Earth, Mars, and Jupiter

• Jupiter, Saturn, Uranus, and Neptune

Which planets are known as the gas giants?

• Mercury, Earth, Saturn, and Neptune

• Mercury, Venus, Earth, and Mars

• Venus, Earth, Mars, and Jupiter

• Jupiter, Saturn, Uranus, and Neptune

The Inner planets rotate at a slower speed than outer planets.

• True

• False

Saturn is the only planet in the Solar System that has rings.

• True

• False

A planetary-mass object that does not dominate its region of space (as a planet does) and is not a satellite.

• Comet

• Moon

• Dwarf Planet

• Asteroid