The answer is: Aristotle.
Aristotle (384–322 BC) was an ancient Greek philosopher.
He was interested in empirical studies and shifted from Platonism to empiricism.
Empiricism is a theory that states that knowledge comes from sensory experience and through experiments.
Empirical evidence is the information received by observation through experimentation.
Physical changes can be reversed and chemical changes can’t be reversed. A physical property is a characteristic which can be identified without changing the substance but to identify a chemical property, you do have to change the substance.
Except:they are safe for all organisms except insect pest
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