Any physical or functional change in the body from a normal state which causes discomfort or disability is called a disease.

Q.

Microbial diseases that can spread from an infected person to a healthy person through the air, water, food or physical contact are called communicable diseases. State true or false.

Q. State whether true or false
Burning of paper is a physical change.

Q. Melting of butter is a physical change. State whether the statement is true or false

Q. State true or false:
Communicative diseases are also called contagious diseases

Q. Introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem i.e, physical systems or living organisms, is called as