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31 terms

Vocabulary Review Test 2 (Science)

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Physical Change
a change that alters the form or appearance of a material but does not make the material into a different substance
Chemical Bond
the force of attraction that holds two atoms together
Indicator
a compound that changes color in the presence of an acid or a base
Heterogenous Mixture
you can usually see the different parts and they can easily be separated out
Homogeneous Mixture
evenly mixed that you can't see the different parts, difficult to separate the parts
Solution
a mixture containing a solvent and at least one solute that has the same properties throughout; a mixture in which one substance is dissolved in another
Amorphous Solid
a solid made up particles that are not arranged in a regular pattern
Crystalline Solid
a solid that is made up of crystals in which particles are arranged in a regular repeating pattern
Gas
a state of matter with no definite shape or volume
Liquid
a state of matter that has no definite shape but has a definite volume
Polar Bond
a covalent bond in which electrons are shared unequally
Pressure
the force pushing on a surface divided by the area of that surface
Solid
a state of matter that has a definite shape and a definite volume
Surface Tension
the result of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together; causes the surface to act as if it has a thin skin
Viscosity
a liquid's resistance to flowing
Boiling Point
the temperature at which a liquid boils
Sublimation
the change in state from a solid directly to a gas without passing through the liquid state
Condensation
the change in state from a gas to a liquid
Freezing
the change in state from a liquid to a solid
Melting
the change in state from a solid to a liquid
Melting Point
the temperature at which a substance changes from a solid to a liquid
Vaporization
the change of state from a liquid to a gas
Freezing Point
the temperature at which a substance changes from a liquid to a solid
Mixture
two or more substances that are together in the same place but their atoms are not chemically bonded
Boiling
vaporization that occurs at and below the surface of a liquid
Solute
the part of a solution that is dissolved by a solvent
Solvent
the part of a solution that is usually present in the largest amount and dissolves a solute
reactants
anything that you put into rxn (reaction)
products
result of the reaction
Physical Bond
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Chemical Change
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