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[{"$nulls":5},"Terrestrial Planets"]
[]
["So much to learn about the planets!  At the Hall of Justice, the Superfriends were comparing"]
["notes on what they have learned during their travels in outer space, battling the forces of evil."]
["Can you match each terrestrial planet with its equatorial radius (abbreviated in the clues as"]
["ER) and corresponding mean orbital velocity (abbreviated as MOV)?"]
[]
["1)  The planet closest to the sun does not have a mean orbital velocity of 29.79 km/sec."]
["2)  The planet with an ER of 6,378 km (which does not have a MOV of 47.89 km/sec) is not"]
["          the fourth planet."]
["3)  The planet with an ER of 6,052 km is in sequential order directly after the planet with an"]
["          ER of 2,439 km, but is closer to the sun than the planet with a MOV of 24.14 km/sec."]
["4)  The planet with the MOV of 29.79 km/sec is not the planet with an ER of 3,397 km."]
["5)  The planet with a MOV of 35.04 km/sec follows in sequence as you go away from the"]
["          sun immediately after the planet with a MOV of 47.89 km/sec."]
[]
[]
[null,null,null,"   Planet",null,null,"Mean orbital velocity"]
[null,null,"  Mercury","  Venus","  Earth","  Mars","  24.14 km/sec","  29.79 km/sec","  35.04 km/sec","  47.89 km/sec"]
[null,"2,439 km  "]
["Equatorial","3,397 km  "]
["radius","6,052 km  "]
[null,"6,378 km  "]
[null,"24.14 km/sec  "]
["Mean orbital","29.79 km/sec  "]
["velocity","35.04 km/sec  "]
[null,"47.89 km/sec  "]
[]
[null,"Body of rotation",null,null,"Equatorial",{"$nulls":4},"Mean orbital "]
["Planet","period (hours)",null,null,"radius (km)",{"$nulls":4},"velocity (km/sec)"]
[]
["Mercury","1,408 hours"]
[]
["Venus","5,832 hours"]
[]
["Earth","23.93 hours"]
[]
["Mars","24.62 hours"]

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