Ch. 7 The Solar System

The solid inner part of a comet is called

All the inner planets

This planet has a sideways rotation

What surround the inner core of Jupiter and Saturn?

What keeps planets in orbit around the Sun?

Which object lost its designation as a planet in 2006 and is now classified as a dwarf planet?

The two factors that keep a planet in orbit around the Sun are

Why do scientists think that liquid water might have once existed on Mars?

How many tails does a comet have?

A spherical object orbiting the Sun that has objects of similar mass orbiting nearby is a

How is Venus unlike other planets?

Which inner planet has the longest period of revolution and why?

All the outer planets are made mostly of

The sun makes up what percent of the mass of the solar system?

The nickname for the inner planets is

The 4 Galilean moons are

The shape of a planet's orbit is a(n)

3 dwarf planets are

This planet is characterized as having extreme changes in daily temperature

This planet would float if placed in water

The outer planets are composed mainly of

The planets are so far apart that scientists measure the distances between them in

What occurs when a planet's atmosphere traps solar energy & the surface temperature increases?

The name for a small, rocky particle that strikes a planet or moon

All of the outer planets are known for having these

When does a meteoroid become a meteor?

Comets form a glowing tail when

Because Mercury's mass is so small, it

Neptune has how many moons?

This orbits the Sun, is spherical, and has mass greater than mass of other objects near it

Why is Venus the hottest inner planet?

Other than the tails, this is also a visible part of a comet

Which planet is the solar system's largest?

Earth is the only planet with a wide variety of life because of its

These two planets are blue in color