-ology's & -onomy's
100

The specific scientific study of animals

Zoology

200

This evidence-based physical science is the study of everything beyond Earth's atmosphere, including stars, planets, galaxies, comets, and the universe as a whole 

Astronomy

300

Tom Cruise, John Travolta, and Katie Holmes are members of The Church of this nondenominational religious movement founded in the 1950s

Scientology

400

A branch of science concerned with the interrelationship of organisms and their environments 

Ecology

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