Set: Chapter 1 Matter

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All 22 Terms

Term Definition
Characteristic property A quality of a substance that never changes and can be used to identify the substance.
Boiling point The temperature at which a substance changes from a liquid to a gas.
Melting point temperature at which a substance changes from a solid to a liquid.
Physical change A change in a substance that does not change its identity: for example, a change of state.
Chemical change A change in which one or more substances combine or break apart to form new substances.
Chemical activity A characteristic property of a substance that indicates its ability to undergo a specific chemical change.
Mixture Two or more substances that are mixed together but not chemically combined.
Solution A very well-mixed mixture.
Pure substance A substance made of only one kind of matter and having definite properties.
Element A substance that cannot be broken down into other substances by chemical or physical means.
Compound A substance made of two or more elements chemically combined.
Weight A measure of the force of gravity on an object.
Mass A measure of how much matter is in an object.
Volume The amount of space that matter occupies.
Density The measurement of how much mass of a substance is contained in a given volume.
International system of units (SI) The system of units used by scientists to measure the properties of matter.
Atom The smallest particle of an element.
Molecule A combination of two or more atoms.
Chemical bond The force that holds two atoms together.
Ore A rock that contains a metal or other economically useful element.
Electrolysis A process by which an electric current breaks chemical bonds.
Electrode A metal strip used in electrolysis.

Set Information

Terms 22
Creator Brooksj1263
Created December 18, 2007
Groups None
Tags brooks, grade, jhs, seventh
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Description

Vocab review for 7th grade - Chapter 1 An Introduction to Matter

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Most Missed Words

  1. Characteristic property → A quality of a substance that never changes and can be used to identify the substance. - 23 misses
  2. Pure substance → A substance made of only one kind of matter and having definite properties. - 22 misses
  3. International system of units (SI) → The system of units used by scientists to measure the properties of matter. - 19 misses
  4. Electrolysis → A process by which an electric current breaks chemical bonds. - 18 misses
  5. Chemical activity → A characteristic property of a substance that indicates its ability to undergo a specific chemical change. - 17 misses
  6. Electrode → A metal strip used in electrolysis. - 14 misses
  7. Element → A substance that cannot be broken down into other substances by chemical or physical means. - 13 misses