10 Questions
The Solar System is composed of the Sun and the objects that orbit it.
True
There are nine planets in the Solar System.
False
The gas giants in the Solar System are mostly made of hydrogen and helium.
True
The ice giants in the Solar System are mostly made of rock and metal.
False
The Solar System was formed from the gravitational collapse of a giant interstellar molecular cloud.
True
The largest of such objects are the ______ planets, in order from the Sun: four terrestrial planets named Mercury, Venus, Earth and Mars, two gas giants named Jupiter and Saturn, and two ice giants named Uranus and Neptune.
eight
The ______ planets have a definite surface and are mostly made of rock and metal.
terrestrial
The gas giants are mostly made of ______, while the ice giants are mostly made of 'volatile' substances such as water, ammonia, and methane.
hydrogen and helium
In some texts, these terrestrial and giant planets are called the inner Solar System and outer Solar System planets respectively.
inner and outer
The Solar System was formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. Over time, the cloud formed the Sun and a protoplanetary disk that gradually coalesced to form planets and other objects. That is the reason why all eight planets have an orbit that lies ______.
n
Test your knowledge about the Solar System and its planets in this quiz! From the inner rocky planets to the outer gas giants and ice giants, challenge yourself with questions about their characteristics and order from the Sun.
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