Solar System Overview

            Which of the following is NOT considered a terrestrial-planet?

• Mars

• Venus

• Neptune

• Mercury

In order for an object to be considered a planet, the object must have a moon

• true

• false

In order for an object to be considered a planet. the object must orbit a star.

• true

• false

In order to be considered a planet, an object need to have enough gravity to pull it into a spherical shape.

• true

• false

According to scientists, the solar system formed from

• colliding planetesimals.

• rotating stars.

• colliding nebulae.

• a rotating disk of dust and gases.

In order to be considered a planet, an object must dominate its orbit

• true

• false

Most asteroids lie between the orbits of

• Jupiter and Saturn.

• Mars and Jupiter.

• Jupiter and Neptune.

• Mars and Earth.

In order for an object to be considered a planet, an object must be solid.

• true

• false

The Kuiper Belt is a region beyond Neptune containing

• comets with short orbit periods.

• meteors smaller than 1 km across.

• a dense collection of meteoroids.

• comets with unusually large nuclei.

Why is Pluto classified as a dwarf planet?

• it is too small

• It is too far away

• It has too few moons

• It has too many objects in its orbit