Download Planets of the Solar System Quiz Answer Key

Planets of the Solar System Quiz Answer Key 1) Place the following planets in order from closest to farthest from the Sun: Mercury, Uranus, Jupiter, Mars. Mercury, Mars, Jupiter, Uranus 2) An astronomical unit is a unit of distance defined by… a) the diameter of the Sun. b) the distance from the center of the Sun to orbit of the farthest planet. c) the distance from the center of the Sun to the orbit of Earth. d) the distance from the center of the Sun to the orbit of the nearest planet. 3) The outer planets are separated from the inner planets by the _asteroid_ _belt_. 4) Place the following planets in order from farthest to closest to the Sun: Earth, Saturn, Venus, Neptune. Neptune, Saturn, Earth, Venus 5) At times, Pluto is closer to the Sun than Neptune. a) true b) false 6) The orbits of planets tend to be… a) perfectly circular. b) slightly elliptical. c) heavily elliptical. d) spherical. 7) The outer planets are larger than the inner planets. a) true b) false 8) Place the following dwarf planets in order from closest to farthest from the Sun: Pluto, Ceres, Haumea, Eris, Makemake. Ceres, Pluto, Haumea, Makemake, Eris 9) Dwarf planets occur beyond the outer planets. a) true b) false – Ceres is between Jupiter and Mars 10) A day on a planet is how long it takes that planet to rotate completely around once on its axis. Days become shorter as you get closer to the Sun because of the Sun’s gravity. a) true b) false – the Sun’s gravity actually slows a planet’s rotation as the planet orbits