Chemistry Chapter 21

 ___________: The study of matter.  ____________: Anything that has mass and volume. Remember, mass and weight ______ the same thing Remember, mass and weight ______ the same thing

Properties  Properties: there are two main types of properties—___________ & _________.  ______________: a characteristic of matter that can be observed or measured WITHOUT changing the composition of a substance.

Properties (cont.)  Examples:

Properties (cont.)  ______________: a physical property that is independent of the amount of the material.  In other words, properties that remain the same _______________________ of the substance you have.

Properties (cont.) Examples:

 _______________________: a physical property that is dependent on the amount of material.  In other words, properties that ______________________ of the substance you have.

Properties (cont.)  Examples:  volume  mass,  weight

Properties (cont.)  ___________________: a characteristic of a substance that is observed when it undergoes a chemical change.  Ask yourself, does this substance have the _____________ to undergo change?

Properties (cont.)  Examples:  ______________—a substances ability to burn.  __________—a substance’s ability to undergo a reaction that may have dangerous results such as explosion, fire, etc.  __________—a substance’s ability to combine with oxygen.

Changes  ________________: a change in matter that does NOT produce a new substance.  Usually only the __________ of a substance changes.  Often, physical changes are ________(but not always).  Examples:

Changes (cont.)  _________________: a change in matter that DOES produce a new substance.  Occurs when a _________________ takes place.

Changes (cont.)  The substances produced during a chemical change are __________________ from the original substances.  The new substance has its _____________.  The change is _____________.

Indicators of a Chemical Change  Signs that a chemical change has occurred:  A solid ___________ forms.  __________________ is produced.  A _________ is produced.  A ___________________ occurs.