Distinguish between a change in demand and change in quantity demanded.

The difference between change in demand carve and change in quantity demand curve is given below:

  

Change in quantity demand	No	Change in demand
Change in quantity means movement alone demand curve.	1.	Change in demand curve means shift in demand.
Change in quantity demand refers movement alone demand curve due to changing price but other factors are constant.	2.	Change in demand refers shift in demand due to change in factors but price ore constant.
It has two parts- a) extension of demand, b) contraction of demand.	3.	It has two parts- a) increase in demand, b) decrease in demand.
In movement alone demand curve the price changes.	4.	But in shift in demand the price remain same.
Taste and habit are remain unchanged.	5.	Taste and habit are remain change.
Diagram:	6.	Diagram: