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Science Crossword Puzzle:

Across
The saving or keeping of a substance under physical and chemical changes.
Substances that are made of only on type of atom
This change alters the form or appearance of the substance
The measure of mass in a given area of volume
A characteristic of matter that can be observed with out changing the makeup of the matter.
The amount of matter in an object
To separate two liquids by boiling them
To change one unit to another unit.
The measure of the force of gravity on an object
Down
The characteristic of matter that can be observed when the matters makeup is changing.
A change in matter that produces one or more new substances
The basic unit from which all matter is created
Made of two or more substances that are not chemically bonded together
A group of two or more atoms chemically bonded together
A specific kind of matter that always has a specific makeup.
A substance that has two or more different elements chemically bonded.
Any thing that takes up mass or space.
The amount of space the matter occupies.