Why was Queen Elizabeth 2 crowned Queen when her mother is still alive?

There are two kinds of queen: queens consort, who are merely the wives of kings, and queens regnant, who are women who reign in their own right, having inherited the throne from a previous monarch who was their blood relative. Queens consort are not monarchs, they don't reign. They are just wives. Queen Elizabeth is a queen regnant. She inherited the throne from her father, King George VI. When he died, she became the new monarch, and her mother became the Dowager Queen Consort -- the widow of a king. A queen consort does not normally inherit the throne from her husband because she herself is not in the line of succession. Their child inherits it, which is why Elizabeth's mother took the title of Queen Mother, indicating that she was a widowed queen consort whose child had become monarch. Occasionally in history a man and a woman have been joint monarchs, reigning together as a king and a queen regnant, but that's been rare.

Elizabeth,the present queens mother had no claim to the throne,she just married a royal prince who later became king,when he died the throne went to his eldest child,our present queen. elizabeth, the queens mother was given the title the queen mother. (By the way queen elizabeth 1 reigned from 1558-1603!)

She was very much still alive, bless her we as a nation really loved the Queen's mother. She married the queens father who became the king... after his brother abdicated. The line of succession passes in the bloodline... father to child not father-in-law to child's wife. So when her father the king died, princess Elizabeth the eldest child (there were no sons) became the monarch... but her mother became the queen mother (note not the queen's mother but the queen mother) because she remained a queen but not the monarch. Complicated but very old tradition... they just decided to allow the eldest child regardless of gender to become successor in the future... so if William and Kate's child is a girl it could become the first to succeed ahead of her brother.

agagag

Queen Elizabeth II was King George VI's daughter, not Elizabeth I. The Queen Mum, King George's wife was Elizabeth Bowles-Lyon, no relation to Queen Elizabeth I. Elizabeth I reigned in the 16th century and didn't really have anything to do with Elizabeth II or Elizabeth Bowles-Lyon other than her name.

Actually for a brief time between 1952 and 1953, the United Kingdom had 3 queens. There are 3 types of queens. A queen regnant who reigns as monarch in her own right, a queen consort who is the king's spouse, and a queen dowager who is a widowed queen consort. Queen consort and queen dowagers aren't monarchs, so when the monarch passes they aren't involved in the process of determining the new monarch. Queen Mary was George V's wife. From the time he inherited the throne until his passing in 1936, she was queen consort. After his passing and until her death in 1953, she was a queen dowager. Queen Elizabeth, the current monarch's mother, was queen consort while her husband, George VI, was king. When he died in 1952, she became a queen dowager. So for about a year, there were two queen dowagers in addition to a queen regnant. One was the current monarch's mother while the other was her grandmother. And queen consorts and queen dowagers aren't numbered like monarchs are. Queen Elizabeth I was actually the name of the queen regnant who reigned from 1558 to 1603. There have actually been a few Queen Elizabeths who weren't monarchs, and some of those were actually in Continental Europe.

Queen Elizabeth the Queen Mother was a Queen-consort (wife of a reigning King). Queen Elizabeth II is a Queen-regnant (a reigning Queen).

Her MOTHER was NOT the MONARCH silly...Her father WAS......HE DIED....The wife of a KING has the title Queen but is NOT the Monarch...BASIC stuff this....

You really want us to believe you confused Elizabeth Bowes-Lyon, the Queen Mother with Elizabeth I? The first was a Queen Consort that lived in the past century while the other one a Queen Regnant that lived in the Medieval times. Just for the record: The Queen Consort does not have a regnal numeral or an official power, being just a wife. Expecting the Queen Consort to be a Queen Regnant is the equivalent of believing Michelle Obama has the right to succeed her husband as President of the United States if something happens to him while in power. A Queen Regnant, however, is a monarch on her own right, in the same manner as Senator Hillary Clinton is a Senator, not a wife of a Senator...