properties of matter
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Properties of Matter. Physical Properties. Viscosity Conductivity Malleability Hardness Melting point Boiling point Density Ductility Magnetism. Viscosity: the tendency of a liquid to keep flowing – its resistance to flowing . Greater = slower the liquid moves - PowerPoint PPT PresentationTRANSCRIPT
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PROPERTIES OF MATTER
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Physical Properties Viscosity Conductivity Malleability Hardness Melting point Boiling point Density Ductility Magnetism
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Viscosity: the tendency of a liquid to keep flowing – its resistance to flowing .
Greater = slower the liquid moves Viscosity usually decreases when heated
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Conductivity Ability to allow heat to flow. Those materials that have a high
conductivity like metals are called good conductors.
Usually means conductors of heat and electricity.
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Malleability Ability of a solid to be hammered without
shattering. Most metals are malleable.
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Hardness One way to compare is to see which
material scratches the other. Diamond is the hardest mineral and Talc
is softest.
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Melting and Boiling Point The temperature at which a substance changes from solid
to liquid is its melting point. Water = 0° C
The temperature at which a substance boils is its boiling point.
Water = 100 ° C
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Density
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Physical Properties Some of the properties of the material
change, but the substances in the material remain the same.
Water from liquid to a gas during boiling Crumpling and slicing change size and
shape. Some can be reversed (freezing and
melting)
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Chemical Properties Any ability to produce a change in
composition of matter. Can be observed only when the substances in
a sample of matter are changing into different substances.
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Flammability Materials ability to burn in the presence
of oxygen. Sometimes not desirable property.
Children's sleepwear. (flame-resistant) Materials that can burn are used for fuel.
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Reactivity How readily a substance combines
chemically with other substances. Oxygen is reactive easily with most other
elements. Rust Nitrogen is not reactive and used on
ships as a gas to decrease rusting.
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Buoyant Force The upward force on an object immersed
in a fluid. If the buoyant force is equal to the object
then it floats. If the buoyant force is less than the
object then it sinks.