Properties of matter describe the characteristics and
behavior of matter, including the changes that matter
undergoes.
Properties
Extensive properties- dependent the amount of substance
present.
examples: mass, length, and volume
Intensive properties- independent of the amount of
substance present.
examples: melting point, density and freezing point
Pure substance or a mixture?
• Matter is either pure—made up of only one kind of matteror it is a mixture
Pure substances - either an element or compound, with the
same fixed composition and properties.
Mixture- a physical combination of two or more
substances
• Mixtures do not have specific compositions.
• A heterogeneous mixture is one with different
compositions, depending upon where you look.
• Homogeneous mixtures (solutions) are the same throughout.
• Alloys are solid solutions that contain different metals
Separating mixtures
filtering
Evaporation/
boiling
distillation
chromatography
Classification of matter
Properties of Matter
Physicalcharacteristics that
can be observed or
measured without
changing the
identity of a
substance
Chemical- relates to
a substances ability
to undergo changes
that transform it
into a different
substance
• physical change- change in matter that
does not involve a change in the chemical
identity of individual substances.
Examples:
• boiling
• dissolving
• Melting
• Crystallizing
• freezing
• evaporating
Chemical Changes/reactions
chemical change - the
change of one or more
substances into different
substances.
Indicators of a Chemical Reaction
-Color change
-Formation of a gas (bubbles)
-Formation of a precipitate ( a solid that
forms from two liquids)
-Energy change
heat
sound
light