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QR Challenge: Solar System

QuestionAnswer
Our _____ _____ includes the sun, planets and many smaller objects.solar system
The average distance between the earth and the sun; approximately 150 million kilometers. (symbol AU)astronomical unit
How far does light travel in 1 s?300 km/s
The inner planets are also called _______ planets because their surfaces are dense and rocky.terrestrial
The ____ planets are the planets closest to the sun.inner or terrestrial
The inner planets are Mercury, Venus, Earth and ______.Mars
The outer planets are Jupiter, Saturn, ____ and ______.Uranus and Neptune
The outer planets are composed mostly of _____.gases
The planet closest to the sun.Mercury
It takes Mercury to rotate once in ______ days.58
The number of days it takes Mercury to complete one revolution around the sun is _____.88
On this planet, the sun rises in the west and sets in teh east.Venus
This planet is called the Earth's twin.Venus
The atmosphere of Venus is very high due to its _______ effect.greenhouse
Earth has _____ rotation because it spins in a counterclockwise direction or in the same direction as the sun's rotation.prograde
Venus has a _____ rotation because it spins in a clockwise direction.retrograde
The only planet that supports life is ____.Earth
Earth's period of revolution is ____ days.365
The planet that showed evidence of once having water is ____.Mars
many scientists believe that water is frozen beneath the soil and stored in polar ice caps of this planet.Mars
mars has ____ large volcanic systems.two

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