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level: Module #16

Questions and Answers List

level questions: Module #16

QuestionAnswer
Nuclear FusionThe process by which two or more small nuclei fuse to make a bigger nucleus.
Nuclear FissionThe process by which a large nucleus is split into smaller nuclei.
Critical MassThe amount of isotope necessary to sustain a chain reaction.
Absolute MagnitudeThe brightness of a star, corrected for distance, on a scale of -8 to +19. The smaller the number, the brighter the star.
Apparent MagnitudeThe brightness of a star as seen in the night sky. The smaller the number, the brighter the star.
Light YearThe distance light could travel along a straight line in one year.
GalaxyA large ensemble of stars, all interacting through the gravitational force and orbiting around a common centre.