2. The Solar System http://scienceclass.ning.com/

3. The Solar System is made up of the sun and all celestial objects that are held to it by gravity. This includes terrestrial, jovian, and dwarf planets. http://scienceclass.ning.com/

4. Terrestrial Planets - The four innermost planets of the solar system, resembling the Earth in general physical and chemical properties. They are smaller earthy planets made up of mainly rock. Mercury, Venus, Earth, Mars Terrestrial Planets http://scienceclass.ning.com/profiles/blogs/1677792:BlogPost:3195

5. Jovian Planets- Jupiter, Saturn, Uranus, and Neptune. They are large and have a high concentration of hydrogen, they are mainly made up of rock and ice. http://scienceclass.ning.com/profiles/blogs /1677792:BlogPost:3195 Jovian Planets

6. Dwarf Planets Ceres, Pluto, Haumea, Makemake, and Eris http://en.wikipedia.org/wiki/Dwarf_planet

7. Asteroid Belt Asteroid Belt- Is a region of the solar system, between the orbits of Mars and Jupiter, in which most asteroids are found. (between the Jovian planets because it is cold) http://scienceclass.ning.com/profiles/blogs /1677792:BlogPost:3195

8. Comets Comets are small Solar System bodies, typically only a few kilometres across, composed largely of volatile ices. When a comet enters the inner Solar System, its proximity to the Sun causes its icy surface to sublimate and ionise, creating a coma; a long tail of gas and dust often visible to the naked eye. http://en.wikipedia.org/wiki/Comet

9. http://www.aerospaceguide.net/planet/pla netmercury.html