Matter
Matter Classification
Phase Change
Properties of Matter
Chemical and Physical Changes
100
What is a pure substance?
matter that always has the same compostition
100
substances that dissolve and form a homogeneous mixture
What are solutions?
100
solid to liquid
What is melting?
100
something that describes matter
What is a Property?
100
the starting materials in a chemical reaction
What is a reactant?
200
a substance that cannot be broken any smaller
What is an element?
200
Heterogeneous mixtures that separate into layers over time
What are suspensions?
200
liquid to gas
What is evaporation?
200
a material´s ability to allow heat flow
What is conductivity
200
the substances produced by a chemical reaction
What is a product?
300
what is a mixture?
2 or more pure substances
300
contains some particles that are intermediate in size between the small and large particles and cannot be filtered.
What is a colloid?
300
gas to liquid
What is condensation?
300
the tendency of a material to resist flowing
What is viscosity?
300
what are three signs a chemical reaction has occurred?
acceptable answers: color change, odor change, release of heat, gas is created, formation of precipitate
400
two or more elements
What is a compound?
400
mostly solid substance that is not mixed well
What is a heterogeneous mixture
400
solid to gas
What is sublimation?
400
describes how something will react when it changes
What is a chemical property?
400
what are three signs a physical change has occurred?
acceptable answers:
500
made up of different compounds or elements
What is a molecule?
500
a well mixed substance, also known as a solution
What is a homogeneous mixture?
500
gas to solid
What is deposition?
500
characteristics that can be observed without changing the substance
What are physical properties?
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