Read this excerpt from a student’s essay that compares and contrasts Earth to Mars. Which is NOT a true difference? Mars, the outermost of the four terrestrial planets (Mercury, Venus, Earth, and Mars), is the second closest to Earth after Venus. It is slightly more than half the size of Earth and almost twice the size of the Moon. The atmosphere is very thin, less than one one-hundredth that of Earth, and composed primarily of carbon dioxide. Mars is smaller than Earth and larger than Earth’s moon. Venus is closer to Earth than Mars is. Mars has a denser atmosphere than Earth does. Mars is farther away from the Sun than Venus is.