Answer the following question given this paragraph: 

Matter typically exists in one of three states: solid , liquid , or gas . The state a given substance exhibits is also a physical property. Some substances exist as gases at room temperature (oxygen and carbon dioxide), while others, like water and mercury metal, exist as liquids. Most metals exist as solids at room temperature. All substances can exist in any of these three states.


Q: The state of matter - solid, liquid, or gas - is also considered what type of property?


A:
physical