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Science Terms

Across
a test, trial, or tentative procedure; an act or operation for the purpose of discovering something unknown or of testing a principle, supposition, etc.
the act or circumstance of proving or being proved conclusively, as by reasoning or a show of evidence
To fill (something) with air or gas so as to make it swell:
Down
a proposition, or set of propositions, set forth as an explanation for the occurrence of some specified group of phenomena, either asserted merely as a provisional conjecture to guide investigation (working hypothesis) or accepted as highly probable in the light of established facts.
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid.
the reciprocal action of chemical agents upon each other; chemical change.