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Properties of Matter, Has the chapter, Has the chapter, Has the chapter,…
Properties of Matter
Changes of state are physical changes
Matter can change from one state to another
When matter changes state, it doesn't change the substance itself
Liquids can become gasses, and gasses can become liquids
Evaporation
Evaporation is the process by which a liquid becomes a gas
When a solid changes directly to a gas, the process is called sublimation
Boiling
Boiling is another process in which a liquid becomes a gas
Boiling can only occur when the liquid reaches a certain temperature, called the boiling point
Condensation
*The process by which a gas changes its state to become a liquid is called condensation
Solids can become liquids, and liquids can become solids
Melting
Melting is the process by which a solid becomes a liquid
The lowest temperature at which a substance begins to melt is called a melting point
Freezing
Freezing is the process by which a liquid becomes a solid
The temperature at which a specific liquid becomes a solid is called a freezing point
Matter has observable properties
Chemical properties describe how substances form new substances
Physical Properties
Physical properties of clay can be observed without changing the fact that this substance is clay
Density
Density is a measure of the amount of matter in a volume of substance
Physical Changes
A physical change is a change in any physical property of a substance, not in the substance itself
Physical properties describe a substance
Chemical Properties and Changes
Chemical properties describe how substances can form new substances
The change of one substance to another substance is called a chemical change
Signs of a Chemical Change
Production of an odor
Change in Temperature
Change in Color
Formation of a Solid
Formation of Bubbles
Properties Are used to identify substances
Substances have characteristic properties
Properties Used for Identifying Substances
Density
Heating Properties
Solubility
Magnetic Properties
Electric Properties
Identifying Unknown Substances
Measuring properties used for identifying substances
Mixtures can be separated by using the properties of the substances in them
Water Treatment Plants
A chemical is added that causes the larger particles to stick together
Chlorine is added
The water is run through a series of special molecular filters
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