5 Questions
The largest of such objects are the eight planets, in order from the Sun: four terrestrial planets named ______, ______, Earth and Mars, two gas giants named Jupiter and Saturn, and two ice giants named Uranus and Neptune.
Mercury, Venus
The terrestrial planets have a definite surface and are mostly made of ______ and metal.
rock
The gas giants are mostly made of ______ and helium, while the ice giants are mostly made of 'volatile' substances such as water, ammonia, and methane.
hydrogen
In some texts, these terrestrial and giant planets are called the ______ Solar System and outer Solar System planets respectively.
inner
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 of the Solar System and its fascinating celestial bodies in this quiz! From the inner terrestrial planets to the outer gas and ice giants, challenge yourself on everything from their names to their unique characteristics and composition.
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