Heat can alter a substance into another substance. Such as when you bake a cake the batter is changed into a cake and can not be changed back.
a physical change
A change that alters the form of a substance without changing it into another substance is called a physical change. This type of change does not involve a change in the chemical composition of the substance, only its physical appearance. Examples include changes in state (solid to liquid) or changes in shape (cutting or crushing).
catalyst
A pollutant is a substance that alters the composition of its surroundings.
A physical change.Changes between Solid, Liquid, and Gas.
It is considered a physical change. A chemical change involves chemical reactions that change the substance into another substance. A physical change typically only modifies the form or phase.
the rate of the reaction can be increased or decreased
These are called catalysts.
These are called catalysts.
alters the central nervous system
Of course it is ! ANY substance that alters a person's perception - or reaction times -is dangerous !
A substance that dissolves in another substance is called a solute.