15 questions about comets:
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The quiz above includes the following questions:
- Comets are made of a loose collection of ice, dust and ...
- The tail of a comet can be as long as ...
- Comets’ orbital period can vary from ...
- Short (orbital) period comets originate in the ...
- Long (orbital) period comets are thought to originate in the ...
- The solid inner structure of a comet is called the ...
- The thin atmosphere which surrounds a comet is called the ...
- The nuclei of comets tend to be less than ...
- When a comet enters the inner Solar System, solar radiation causes material on the comet to vaporize, and the streams of gas and dust form ...
- The gas tail always point directly ...
- Short period comets have orbital periods of ...
- Short term comets with an orbital period of less than 20 years, and a low inclination to the ecliptic, are called ...
- Comets are commonly described as ...
- Because of their low mass and thus low gravity, comets are ...
- The coma of a comet is generally made of ...