1) The four planets closest to the sun are a) Jupiter, Saturn, Uranus and Neptune. b) Mercury, Venus, Earth, and Mars. c) Mercury, Earth, Mars and Jupiter. 2) Who is the biggest planet? a) Jupiter b) Uranus c) Saturn 3) Is oil denser than water? a) Yes, it is. b) No, it is not. c) It depends. 4) Is oil denser than alcohol? a) Yes, it is. b) No, it is not.

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