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33 Cards in this Set

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  • Back
Chemistry
The study of the properties of matter and how matter changes.
Substance
A single kind of matter that is pure and has a specific set of Properties.
Physical property
A characteristic of a pure substance that can be observed without changing it into another substance.
Chemical property
A characteristic of a pure substance that describes its ability to change into different substances
Element
A pure substance that cannot be broken down into any other substances by chemical or physical means
Atom
The basic particle from which all elements are made.
Chemical bond
A force of attraction between to atoms
Molecules
Groups of two or more atoms held together by a chemical bond
Compound
A pure substance made of two or more elements chemically combined in a ratio
Chemical formula
Shows the elements in the compound and the ratio of the atoms
Mixture
Two or more substances that are mixed together but not chemically combined
Heterogeneous mixture
A mixture in which pure substances are unevenly distributed throughout the mixture
Homogeneous mixture
A mixture in which substances are evenly throughout the mixture
Solution
An example of a homogeneous mixture
Weight
A measure of the force of gravity on you
Mass
The measurement of the amount of matter in the object
International System of Units
The system of units used by scientists to measure the properties of matter
Volume
The amount of space that matter occupies
Density
The ratio of the mass of a substance to its volume
Physical Change
A change in the substance that does not change its identity
Chemical Change
A change in which one or more substances combine or break apart to form new substances
Law of Conservation of Mass
The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
Energy
The ability to work or cause change
Temperature
A measure of the average energy of motion of the particles of a substance
Thermal Energy
The total potential and kinetic energy of the particles in an object
Endothermic Change
A change in which energy is taken in
Exothermic Change
A change in which energy is released
Kinetic Energy
Energy of matter in motion
Potential Energy
The energy an object has because of its position
Chemical Energy
A form of potential energy that is stored in chemical bonds between atoms
Electromagnetic Energy
A form of energy that travels through space as waves
Electrical Energy
Electrical Energy
Electrode
A metal strip that conducts electricity