Unit 1 Vocabulary Flashcard

Physical Property
Any characteristic of a material that can be observed or measure without changing the composition of the substances in the material
Chemical Property
Any property that produces a change in the composition of matter
Density
The ratio of a material’s mass to its volume
Solubility
The maximum amount of solute that normally dissolves in a given amount of solvent at a certain temperature
Viscosity
the tendency of a liquid to keep from flowing; resistance to flowing
Boiling Point
The temperature at which a substance boils
Melting Point
The temperature at which a substance changes from a solid to a liquid
Chemical Change
A change that occurs when a substance reacts and forms one or more new substances
Physical Change
A change that occurs when some properties of a material change, but the substances in the material stay the same
Sublimation
the phase change in which a substance changes from a solid to a gas without changing into a liquid first
Example: Dry Ice
Evaporation
The process that changes a substance from a liquid to a gas at temperatures below the substance’s boiling point
Boiling
Water turning into a gas and bubbling
Precipitate
A solid that forms and separates from a liquid mixture
Atom
The smallest particles of an element
Molecule
A neutral group of atoms that are joined together by one or more covalent bonds
Element
A substance that cannot be broken don into simpler substances
Compound
A substance that is made from two or more simpler substances and can be broken don into those simpler substances
Homogeneous Mixture
A type of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another
Heterogeneous Mixture
A type of mixture in which the parts of the mixture are noticeably different from one another
Solution
A mixture that forms when substances dissolve and form a homogeneous mixture
Kinetic Theory
The energy an object has due to its motion
Plasma
A state of matter in which atoms have been stripped of their electrons
Temperature
A measure of how hot or cold an object is compared to a reference point

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