Mercury Venus Mars Jupiter Saturn 10 10 10

Mercury Venus Mars Jupiter Saturn 10 10 10 20 20 20 30 30 30 40 40 40 50 50 50

Mercury (10) Is Mercury a rocky, gaseous, or icy planet?

Mercury (20) Use one word to describe this planet’s orbital period in relation to other planets.

Mercury (30) What surface features does Mercury have more of than any other planet?

Mercury (40) While Mercury is nearer the sun than any other planet, it is not the hottest. Why?

Mercury (50) What do all other planets have that Mercury does not have?

Venus (10) Is Venus the only planet that can exhibit a complete set of phases as seen from Earth?

Venus (20) Why is the surface of Venus hotter than that of Mercury?

Venus (30) Which gas composes most of Venus’ atmosphere?

Venus (40) Is Venus considered an inferior planet or a superior planet and why?

Venus (50) • Venus is closer to the sun than is Earth. Does Venus require more or less time to orbit the sun than does Earth?

Mars (10) Name one of this planet’s two most notable features.

Mars (20) How many moons does Mars have?

Mars (30) What gas comprises most of the Red Planet’s atmosphere?

Mars (40) What missions to Mars in 1976 were aimed primarily at detecting the presence of life?

Mars (50) • How large is Mars in comparison to Earth expressed as a fraction?

Jupiter (10) Name this planet’s most notable surface feature.

Jupiter (20) Name two of the three main gases that compose this planet’s atmosphere.

Jupiter (30) • Does Jupiter have a solid surface like the terrestrial or rocky planets?

Jupiter (40) Have either lightning or auroras ever been observed in this planet’s atmosphere?

Jupiter (50) The four main moons of Jupiter – Io, Europa, Ganymede, and Callisto – are as a group named after which famous astronomer?

Saturn (10) Name this planet’s most notable feature.

Saturn (20) Give one amazing fact about this planet’s many moons.

Saturn (30) Saturn’s moon Titan is perhaps most famous for what fact?

Saturn (40) What is the prevailing thought about the origin of Saturn’s ring system?

Saturn (50) • The gaps in Saturn’s ring system are most likely caused by…