Physical Science Midterm Exam Review Crossword

the ratio of the mass of a substance to its volume
the attraction between oppositely charged ions.
an atom or group of atoms that has become electrically charged
a change that alters the form or appearance of a material but does not make the material into another substance
a change in which one or more substances combine or break apart to form new substances.
characteristics of a pure substance that can be observed without changing it into another substance.
a substance formed as a result of a chemical reaction.
small, positively charged particles that are found in the nucleus of an atom.
an arrangement of the elements showing the repeating pattern of their properties.
the change of state from a gas to a liquid
the force of attraction that holds two atoms together.
the minimum amount of energy needed to start a chemical reaction
the average mass of all the isotopes of an element.
the basic particle from which all elements are made
anything that has mass and takes up space
the temperature at which a substance changes from a solid to a liquid; the same as the freezing point, or temperature at which a liquid changes to solid.
two or more substances that are together in the same place but their atoms are not chemically bonded.
the amount of matter in an object.
a small particle in the nucleus of the atom, with no electrical charge
a substance that enters into a chemical reaction.
a reaction that releases energy, usually in the form of heat.
a reaction that absorbs energy.
a substance that cannot be broken down into any other substances by chemical or physical means
the amount of space that matter occupies.
a liquid’s resistance to flowing.