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Pure Substances and Mixtures
Grade 7 Science - Mr. Collinson
22
Science
7th Grade
02/05/2020

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Term
Matter
Definition
Anything that takes up space, has mass, and is made up of particles.
Term
Pure Substance
Definition
A material that is composed of only one type of particle; examples of a pure substance include gold, oxygen and water.
Term
Mixture
Definition
A material made up of at least two different pure substances.
Term
Mechanical Mixture
Definition
A mixture in which each material maintains its own properties.
Term
Solution
Definition
A mixture in which the distinct properties of the different substances are combined into one set of properties.
Term
Homogeneous
Definition
A material having only one set of properties.
Term
Heterogeneous
Definition
A mixture, made up of parts that retain their own properties, even if these properties are not visible to the unaided eye.
Term
Solute
Definition
A substance that can be dissolved in a solvent; for example, salt is a solute that dissolves in water.
Term
Solvent
Definition
A substance into which a solute may be dissolved; for example, water is a solvent that dissolves sugar.
Term
Filtration
Definition
The act of pouring a mixture through a mesh, in attempts to separate the components of the mixture.
Term
Filtrate
Definition
The part of a mixture that passes through a filter.
Term
Residue
Definition
The part of a mixture that remains on a filter.
Term
Distillation
Definition
A process for separating the parts of a liquid solution. The solvent is heated and the gas is collected and cooled.
Term
Soluble
Definition
When a solute is able to dissolve in a solvent.
Term
Insoluble
Definition
When a substance is not able to dissolve in another, specific, substance.
Term
Dissolve
Definition
The act of a solute completely combining with a solvent to become a solution.
Term
Dilute
Definition
To weaken the strength of a solution by increasing the amount of solvent.
Term
Dilute Solution
Definition
A solution that contains little solute.
Term
Strengthen
Definition
To increase the strength of a solution by increasing the amount of solute.
Term
Concentrated Solution
Definition
A solution that contains a lot of solute.
Term
Saturated
Definition
A solution in which no more solute can be dissolved at a given temperature.
Term
Supersaturated
Definition
A solution in which heat has been used to dissolve more solute than a solution could normally dissolve.
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