1) What theory did the existence of black holes come from? a) Atomic theory b) Theory of general relativity c) Special relativity theory d) Theory of gravitation 2) How many moons Mars has? a) 4 b) 3 c) 2 d) 1 3) What is the approximate age of the Earth? a) 10 billion years old b) 15 billion years old c) 45 billion years old d) 50 billion years old 4) What is the difference between the rotation movement of Venus and that of the other planets? a) Venus rotates from east to west b) Vênus rotates from west to east c) Vênus rotares from north to south d) Venus rotates from south to north 5) How long does Jupiter’s orbit take? a) Approximately 8 years b) Approximately 10 years c) Approximately 12 years d) Approximately 14 years 6) Which one is hotter? the solar atmosphere or the sun surface? a) The sun surface b) The solar atmosphere 7) What is the farthest planet from the sun in the solar system? a) Jupiter b) Mercury  c) Uranus d) Neptune 8) Tell me the name of only a gaseous planet in our solar system. a) Jupiter b) Mercury c) Venus d) Pluto 9) Is Mercury a rocky or gaseous planet? a) Gaseous b) Rocky

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