6.3 The Solar System Review

A(n) _____________ is a small mass of dust and ice that travels in an orbit around the Sun.

The outer planets are gas giants - _____________.

Astronomers use the average distance between Earth and the Sun as one ___ to measure distances in the Solar System.

_____________ are space rocks that orbit the Sun between Mars' and Jupiter’s orbits.

The inner planets closest to the Sun are small and rocky - _____________.

If a meteoroid makes it through our atmosphere to Earth’s surface, it is called a ____________.

A _____________ is a space rock that is smaller than an asteroid.

Disc-shaped region of icy bodies - including dwarf planets such as Pluto - and comets

Within our Solar System are _____________ major planets.

When a meteoroid enters Earth's atmosphere, it is called a _______.

______ is the ratio of the length in a drawing, model, or map to the length of the real thing.