The Solar System

The outer planets are mainly composed of which of the following?

Which is the correct order of the inner planets

The source of short-period comets is the_______

What is the basic shape of every planet's orbit?

The order of the outer planets outward from the Sun is:

Which space object originates in the Oort Cloud?

A depression formed when a meteorite hits Earth is a(n)?

This planet is sometimes called the Red planet because its soil contains iron oxide.

Long-period comets come from an area at the outer edge of the solar system called the_______.

Mercury is closer to the Sun but Venus is hotter. Why? 

What characteristics do dwarf planets have.

Identify Jupiter's four largest moons.

What is a planet's movement around the Sun called?

What is the basic astronomical unit based on?

Which dwarf planet is located in the asteroid belt?

Scientists believe that all of the outer planets have this physical property.

Small pieces of rock that enter Earth's atmosphere and burn up before they hit the ground are?

Which of the inner planets does not have an atmosphere?

Which of the following is a common trait of the inner planets?

What is a planet's spinning movement called?

This causes space objects to revolve around the Sun.

All of the outer planets have which of the following?

A comet develops a tail because of______.

A small rocky particle from space that strikes Earth's ground is a _____.

This planet has colorful clouds in bands of white, red, tan, and brown.