Difference and Similarities of Earth Mercury Venus and Mars

What does Terrestrial planets mean?

Earth like planets

Made out of Rocks or Metals ..

.

Have a Molten and a Heavy metal core

MERCURY

HOW MERCURY ORBITS

VENUS

EARTH

Trivia question

Guys can you guess how old is our planet earth?

MARS

Inner Planets

Outer Planets

http://abackgrounds.com/earth-wallpaper-desktop/

http://www.sciencebuzz.org/blog/saturday%E2%80%99s-featured-planet-mercury-where-it-snows-iron%E2%80%A6unde

http://scienceblogs.com/startswithabang/2011/12/10/how-much-like-earth-is-keplers/

http://zzero101.wordpress.com/2013/10/09/planet-mercury-1-day/

http://actionforspace.com/free-desktop-wallpaper-planet-mars/

http://en.wikipedia.org/wiki/Venus

REFERENCE:

http://en.wikipedia.org/wiki/Mars

http://en.wikipedia.org/wiki/Earth

http://en.wikipedia.org/wiki/Mercury

http://www.messenger-education.org/elusive_planet/around_sun.php

http://rap.genius.com/Apeldin-aghassi-space-lyrics#note-1839178

http://wiki.answers.com/Q/What_are_three_major_differences_between_the_inner_and_outer_planetshttp://www.space.com/17028-terrestrial-planets.html