The terrestrial planets ranked in order of decreasing atmospheric density are Venus, Earth, Mars, Mercury. A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System. It is the terrene planets are the inner planets nearest to the Sun.
Portugal and Spain are on the Iberian peninsula.
Italy is on the Italian peninsula.
Greece is on the Balkan peninsula.
Russia
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