1.the planets close to the sun are a) small and rocky. b) large and rocky. c) small and gaseous. d) large and gaseous. 2) galaxy star star system universe order the terms above from smallest to largest. a) star, star system, galaxy, universe b) galaxy, star system, star, universe c) star, star system, universe, galaxy d) star system, star, universe, galaxy 3) evidence shows that interstellar bodies are moving away from earth, some faster than others, which best suggests that the universe a) is shrinking. b) is expanding. c) was not formed by a big bang. d) has always been the same size. 4) our solar system is in the milky way galaxy. what shape is this galaxy? a) oval b) rectangular c) spiral d) triangular 5) planet ⇒ ⇒ galaxy ⇒ universe what is missing in the ordered sequence of the cosmos? a) sun b) earth c) nebulae d) solar system 6) our solar system lies in a) the central ring of the milky way. b) one of the spiral arms of the milky way. c) in the galactic center of the milky way. d) outside the spiral arms of the milky way. 7) scientists believe that the universe is expanding. which theory about the creation of the universe best supports this belief? a) creation theory b) big bang theory c) protouniverse theory d) bouncing universe theory 8) which characteristic of the sun is most responsible for keeping the planets in orbit? a) its mass b) its color c) it is made of hydrogen and helium d) it is located in the center of the solar system 9) inner planets planet distance from the sun (in million miles) diameter (in mils) temperature (kelvin) number of moons mercury 36 3,031 100 - 700k 0 venus 67.2 7,521 726k 0 earth 93 7,926 260 - 310k 1 mars 141.6 4,222 150 - 310k 2 based on the information in the table, which inner planet is closest to the sun? a) earth b) mars c) mercury d) venus 10) the planets in our solar system move around the sun because of a) its atmosphere. b) radiation. c) gravity. d) energy.