Terrestrial Planet

Primary gas of all 4 terrestrial planets

Carbon dioxide

Planets in order by size, diameter

Mercury, Mars, Venus, Earth

Unique geographical features on each planet

Mercury - heavily cratered surface, looks like the moon, essentially no atmosphere, Caloris Basin, congealed lava flows, Venus - thick atmosphere, deep sulfuric acid clouds, hottest planet, immense volcanic peaks, Earth - diverse ecosystems, blue seas, white clouds Mars - largest volcano, polar caps of ice and CO2, vast red deserts with craters and dunes, canyons, and dry river beds, ancient volcanoes, thin CO2 atmosphere

Planets with moons

Earth, Mars

Planets with water

Earth (liquid water on surface), Mars (ice caps and subsurface water)

Planets with greenhouse effect

Venus, Earth, Mars

Unique features of Earth

Abundant liquid water, diverse life forms, oxygen-rich atmosphere

Atmospheric features of Earth

Clouds, moderate temperature range, 23.5-degree axial tilt