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Correct Answer: B) Hydrogen + helium gas.
Correct Answer: D) Meteors.
Correct Answer: B) Mars and Jupiter.
Correct Answer: A) Venus.
Correct Answer: A) 27.
Correct Answer: C) The planet's red color.
Correct Answer: C) The suns gravitational pull.
Correct Answer: A) Mars.
Correct Answer: A) Earth to orbit the Sun.
Correct Answer: B) Has 8 planets, but is mostly empty space.
Correct Answer: B) Venus.
Correct Answer: B) Jupiter.
Correct Answer: C) Mercury orbits closer to the sun.
Correct Answer: D) The Sun is the closest star to Earth.
Correct Answer: D) Heliocentric.
Correct Answer: A) The Terrestrial Planets.
Correct Answer: C) Red Planet.
Correct Answer: B) A theory of how the Universe began.
Correct Answer: C) Mars.
Correct Answer: C) Comparing.
Correct Answer: B) The heat from the Sun is reflected from Moon to the Earth.
Correct Answer: B) Through a hot, spinning cloud of gases & dust.
Correct Answer: C) Between the orbits of Mars and Jupiter.
Correct Answer: C) It moves in an orbit around the Sun.