Question

student name class period date physical and chemical properties and changes study guide
complete the study guide as the teacher presents and explains information on the chemical and physical properties and changes presentation slides

1. physical property: can be observed and measured ____________ changing the kind of matter being studied; can be used to identify substances
2. examples of physical properties are ____________
3. chemical property: any of a materials properties that becomes evident during a chemical ____________; that is, any quality that can be established only by changing a substances chemical identity.
4. can be used to help ____________ a substance
5. usually involves the substances ____________ with another specific substance

examples of chemical properties
reacting with oxygen (oxidation): the ability of a substance to __________ is a chemical property that involves a substance reacting quickly with __________ to produce light and heat. (i.e., iron rusts or apples turn brown).
reacting with acids: the ability of a substance to ____________ with an acid is a chemical property. some metals react with various acids to form compounds. all metals do not react with all acids. bases react with acids to form water and neutralize the acid.
reactivity: the tendency of a substance to undergo ____________ either by itself or with other materials; reactivity is a chemical property of an element.

Explanation:

1. Physical properties can be observed without changing the kind of matter.
2. Examples include color, density, melting - point.
3. Chemical properties are evident during a chemical reaction and involve changing a substance's chemical identity.
4. Chemical properties help identify a substance.
5. Reacting with oxygen involves oxidation, reacting with acids forms compounds, and reactivity is the tendency to react.

Answer:

1. without
2. color, density, melting - point
3. chemical reaction
4. identify
5. reaction

Reacting with Oxygen: react with oxygen
Reacting with Acids: react
Reactivity: a chemical reaction