Scientific Study

Scientific study

➢ Scientific study :- Scientific study is the planned and organized way of study which is based  on scientific facts, principles, scientific models, experiments and physical states.

➢ Variable :- The factors, traits on conditions that can modified and measured during an experiment is called variables.

➢ Types of variables:- 

(1) Independent variable                                

(2) Dependent variable                                    

(3) Controlled variable

➢ Independent variable :- The variable that can be changed during an experiment by scientists or researchers is called independent variables.

➢ Dependent variable :- The variable which depends upon the change in independent variable and cannot determine directly by scientist is called dependent variable.

➢ Controlled variable :- The variable which is kept constant during an experiment by researchers is called controlled variable.

➢ Physical quantities:- The quantities which can be measured are called physical quantities.

➢Fundamental units :- The units which do not depends upon other units is called fundamental unit.

➢Derived units :- The units which depends upon fundamental units or other units is called derived units.

➢SI units of physical quantities :-

Physical quantities	SI units
Length	meter(m)
Mass	kilogram (kg)
Time	second(s)
Temperature	kelvin(K)
Electric current	ampere(A)
Amount of substance	mole(mol.)
Luminous intensity	candela(cd)

➢ Unit-wise analysis of equations :- We can get various formulae and equations as a result of the conclusions of scientific learning. We can check  the homogeneity and validity by analyzing th units of physical quantities.