Studied by 14 peoplePhysical Property
A characteristic of a substance that can be observed and measured without changing the identity of the substance.
What can be used to detect physical properties?
Senses
Examples of Physical Properties
color, shape, texture, size, electrical conductivity, density, thermal conductivity, malleability, melting point, boiling point, luster, magnetic attraction, mass, volume
State of Matter
The physical form in which a substance exists
Density
The amount of mass in a given volume
Electrical conductivity
A measure of how well an electric current can move through a substance
Thermal conductivity
The rate at which a substance transfers heat
Malleability
The ability of a substance to be rolled or pounded into various shapes.
Luster
Shininess
Melting point
The temperature at which a substance changes from a solid to liquid
Boiling point
The temperature at which a substance changes from a liquid to gas
Chemical property
A property that describes a substance's ability to change into a new substance with different properties
Examples of chemical properties
Flammability, reactivity with substances such as oxygen, water and acids, rusting, tarnishing
Why are rusting and tarnishing chemical properties?
Because the metal changes.
Flammability
The ability of a substance to burn
What substances are formed when wood burns?
Water, carbon dioxide and ash
Reactivity
The ability of a substance to interact with another substance and form one or more new substances.
Characteristic properties
Properties unique to a substance
Physical change
A change that affects one or more physical properties of a substance
Chemical change
A change that occurs when one or more substances change entirely into new substances with different properties.
What do you do to witness a log's flammability?
You must set it on fire.
Examples of chemical changes
Production of an odor, production of a gas, formation of a precipitate, change in color, change in energyP
How does a chemical change occur when an antacid is dropped into a glass of water?
The tablet makes contact with the water and begins to react to it, so bubbles of gas appear.
Precipitate
When liquids combine to form a solid
Law of Conservation of Mass
In ordinary chemical and physical changes, mass is not created nor destroyed but is only transformed into different substances.
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