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Properties of Matter 2.2
physical properties
24
Science
9th Grade
09/10/2012

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Term
Physical Property
Definition
Any characteristic of a material that can be observed of measured without changing the composition of the substances in the material.
Term
Viscosity
Definition
The tendency of a liquid to keep from flowing. (its resistance to flowing)
Term
Conductivity
Definition
A material's ability to allow heat to flow.
Term
Malleability
Definition
The ability of a solid to be hammered without shattering.
Term
Melting Point
Definition
The temperature at which a substance changes from solid to liquid.
Term
Boiling Point
Definition
The temperature at which a substance boils.
Term
Filtration
Definition
A process that separates materials based on the size of their particles.
Term
Distillation
Definition
A process that separates the substances in a solution based on their boiling points.
Term
Physical Change
Definition
A change that occurs when some properties of a material change, but the substances in the material stay the same.
Term
What are some examples of physical properties?
Definition
Viscosity, conductivity, malleability, hardness, melting point, boiling point, and density are examples of this.
Term
What is an example of a liquid with high viscosity?
Definition
Honey is an example of a liquid with this amount of viscosity.
Term
What is an example of a liquid with low viscosity?
Definition
Water is an example of a liquid with this amount of viscosity.
Term
What type of material is NOT a good conductor of heat?
Definition
Wood is a type of material with this amount of conductivity.
Term
What type of material is a good conductor of heat?
Definition
Metal is a type of material with this amount of conductivity.
Term
True or False: Very few metals are malleable.
Definition
False: Most metals are that actually.  On the other hand, ice and glass aren't.
Term
What is one way to compare the hardness of two materials.
Definition
You can scratch two materials together to compare them to each other for this physical property.
Term
How is density useful?
Definition
Density can be used to test the purity of a substance.
Term
What are three ways that physical properties are useful?
Definition
Physical properties are used to identify a material, to choose a material for a specific purpose, or to separate the substances in a mixture.
Term
The identification of a material can be a crucial step for what?
Definition
It is a crucial step for solving a crime.
Term
True or False: People just consider one property when choosing a material for a particular application.
Definition
False: People consider a whole set of properties when doing this job.
Term
What are two common separation methods?
Definition
Filtration and distillation are two common of this kind of method.
Term
What is a type of instrument used for filtration?
Definition
A strainer is a type of this separation method.
Term
What is one practical use of distillation?
Definition
Providing fresh water for submarines is an example used for this separation method.
Term
What are two examples of a physical change?
Definition
Crumpling a piece of paper and slicing a tomato are two examples of this.
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