There is a device called a thermometer for that...
The Harappa’s system of standardized weights and measures signified advance technology and an advancing civilization in the Indus River Valley. Remarkable accuracy in systems and tools of the Harappan people were demonstrated by fire-baked bricks which were consistently moisture resistant and uniformly sized.
The United States of America is an example of a democratic country but with specific election process. Unlike other democratic country that its the people of the country decides who will be their president, USA elect their president through electoral college.
because they're different ways