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chemical reaction vocabulary

Across
a pure substance made of only 1 type of atom that can not be broken down further into other substances.
an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
to change the order or position of something
a process in which atoms rearrange to form new substances
the tiny pieces that all matter—all the stuff in the world—is made of
the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA
a method of investigation in which a problem is first identified and observations, experiments, or other relevant data
Down
the relative size of things
information about the natural world that is used to support or go against (refute) a claim
something that can be observed about a substance, such as color, smell, or boiling point
something that is made of all the same atoms or groups of atoms
a proposed answer to a question about the natural world
a starting substance that is part of a chemical reaction
an ending substance that is made during a chemical reaction
to prove (a statement, theory, charge, etc) of (a person) to be false or incorrect; disprove.