1) How much hydrogen does Sun have a) 74% b) 42% c) 24% d) 47% 2) Which planet is hottest in the solar system? a) Jupiter b) Mercury c) Venus d) Saturn 3) How many time periods does the Mesozoic Era Have? a) 3 b) 4 c) 5 d) 9 4) Where is the sun at? a) Outside our solar system b) In middle of our solar system c) Nearby the earth d) Nearby the jupiter 5) Is there any chances for dinosaurs to enter the earth again? a) Yes b) No c) Maybe d) Both

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