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35 Cards in this Set
- Front
- Back
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matter
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anything that has mass and takes up space
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chemistry
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study of properties of matter and how matter changes
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substance
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single kind of matter that is pure and has a specific set of properties
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physical property
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characteristic of a pure substance that can be observed without changing it into another substance
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chemical property
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characteristic of a pure substance that describes its ability to change into a different substance
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element
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pure substance that cannot be broken down into other substances by chemical or physical means
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atom
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the basic particle from which all elements are made
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chemical bond
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the force that holds two atoms together
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molecule
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a particle made of two or more atoms bonded together
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compound
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a pure substance made of two or more elements chemically combined
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chemical formula
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a formula that gives the elements in a compound and the ratio of atoms
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mixture
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two or more substances that are mixed together but not chemically combined
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heterogeneous mixture
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a mixture in which pure substances are unevenly distributed throughout the mixture
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homogeneous mixture
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a mixture in which pure substances are evenly distributed throughout the mixture
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solution
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an example of a homogeneous mixture; forms when substances dissolve
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weight
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a measure of the force of gravity on an object
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mass
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a measure of how much matter is in an object
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International System of Units
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the system of units (SI) used by scientists to measure the properties of matter
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volume
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the amount of space that matter occupies
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density
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measurement of how much mass of a substance is contained in a given volume
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physical change
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a change in a substance that does not change its identity
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chemical change
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a change in which one or more substances combine or break apart to form new substances
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law of conservation of mass
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principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
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energy
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the ability to do work or cause change
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temperature
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a measure of the average energy of motion of the particles of a substance
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thermal energy
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the total energy of all the particles of an object
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endothermic change
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a change in which energy is taken in
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exothermic change
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a change in which energy is given off
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kinetic energy
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the energy of matter in motion
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chemical energy
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a form of potential energy that is stored in chemical bonds between atoms
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potential energy
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the energy an object has because of its position; also the internal stored energy of an object, such as stored in chemical bonds
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electromagnetic energy
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a form of energy that travels through spaces a waves
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electrical energy
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the energy of electrically charged particles moving from one place to another
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electrode
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a metal strip that conducts electricity
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Density
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mass
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