Key Concepts Elements and compounds have specific physical and chemical properties. Elements and compounds can form new substances during a chemical change. The physical and chemical properties of a new substance, formed as a result of a chemical change, are different from the properties of the original substances. Physical properties of matter are characteristics that can be observed or measured, for example color, melting point, and conductivity. Chemical properties are characteristics that can only be observed or measured when atoms of matter rearrange during a chemical change, for example as when iron rusts, paper burns. Evidence that a new substance formed from a chemical change includes production of a gas, changes in temperature, production of a precipitate or a color change.

Key Concepts
Elements and compounds have specific physical and chemical properties. Elements and compounds can form new substances during a chemical change. The physical and chemical properties of a new substance, formed as a result of a chemical change, are different from the properties of the original substances.
Physical properties of matter are characteristics that can be observed or measured, for example, color, melting point, and conductivity. Chemical properties are characteristics that can only be observed or measured when atoms of matter rearrange during a chemical change, for example as when iron rusts, paper burns.
Evidence that a new substance formed from a chemical change includes the production of gas changes in temperature, production of a precipitate or a color change.
Student Expectation
 

The student is expected to identify the formation of a new substance by using the evidence of a possible chemical change such as the production of gas, change in temperature, production of a precipitate, or color change.

 

Fundamental Questions
How are properties of substance used to determine if a possible chemical change occurred? 
What are physical properties? What are chemical properties?
What evidence can be used to identify the formation of a new substance from a possible chemical change? 
Fundamental Questions
How are properties of substance used to determine if a possible chemical change occurred? 
What are physical properties? What are chemical properties?
What evidence can be used to identify the formation of a new substance from a possible chemical change?