The term 'One of the Planets' refers to four of the eight planets in our Solar System: EARTH, VENUS, URANUS, and MARS. EARTH is a terrestrial planet composed of rock and metal, with an atmosphere of nitrogen and oxygen. VENUS is the second planet from the Sun and is the hottest planet in the Solar System due to its thick atmosphere of carbon dioxide. URANUS is an ice giant composed of hydrogen, helium, and methane, and is the seventh planet from the Sun. MARS is the fourth planet from the Sun and is known as the Red Planet due to its reddish-brown color.