1) To spin around one's axis a) revolution b) Rotation c) Orbit d) Revolutionary period 2) How long does it take Earth to make one revolution? a) 365 days b) 24 hours c) A light year 3) Which planet has the biggest gravitational force? a) Mars (0.11x Earth's mass) b) Jupiter (318x Earth's mass) c) Earth (1x Earth's mass) d) Saturn (95x Earth's mass) 4) As distance from the Sun increases, orbital speed... a) Decreases b) Increases c) stays the same 5) Which planet has the longest revolutionary period? a) Mercury b) Earth c) Saturn d) Neptune 6) Which planet has the fastest orbital speed? a) Mercury b) Mars c) Neptune d) Earth 7) A year on Jupiter is __________ a year on Earth a) equal to b) longer than c) shorter than 8) A planet has 5 hours of day and 5 hours of night. In 10 hours the planet will experience... a) one revolution b) one rotation c) one year 9) The farther a planet is from the Sun, the ______ its year. a) longer b) shorter 10) The closer a planet is to the Sun, the _________ the temperature a) hotter b) cooler 11) Which is hotter? a) Mars b) Saturn

Trends in the Solar System

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