Is a variable a thing that can change?

Answer 1

A variable change such as ice melting into water, which can be frozen again into ice later on is called a physical change.

while a permanent change such as growing of a tree is called a chemical change

Answer 2

In an experiment, factors that you change are called independent variables.

Answer 3

No. It is a const. It may take up storage like a variable, but it is not an l-value.

const int i = 17; // i can not be further changed

Answer 4

Yes, and in science , it is a factor that could change. But in math, u have to solve for it.