Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. ... To identify a chemical property, we look for a chemical change.
"What is human nature?" is the key question psycology seeks to answer
Muscle spasms is the answer i belive because you dont have the control
Plants leafs increasing carbon dioxide. it's remove dust air pollution