1
Q
Nuclear Fusion
A
The process by which two or more small nuclei fuse to make a bigger nucleus
2
Q
Nuclear Fission
A
The process by which a large nucleus is split into two smaller nuclei
3
Q
Critical Mass
A
The amount of isotope necessary to cause a chain reaction
4
Q
Star magnitude
A
The brightness of a star on a scale of -8 to +17. The smaller the number, the brighter the star.
5
Q
Light Year
A
The distance light travels in one year
6
Q
Galaxy
A
A massive ensemble of hundreds of millions of stars, all interacting through the gravitational force, orbiting around a common center
Apologia Physical Science
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