For example, the average age of the onset of menstrual periods in girls was 15 in 1900. By the 1990s, this average had dropped to 12 and a half years of age.uberty facts. 1  Puberty is the period of sexual maturation and achievement of fertility. 2  The time when puberty begins varies greatly among individuals; however, puberty usually occurs in girls between the ages of 10 and 14 and between the ages of 12 and 16 in boys.
Herbert Hoover was the president of the U.S. when the great depression began in 1929.
In 1932, Franklin Delano Roosevelt was elected president and he promised a New Deal for the American people. Congress created The Works Progress Administration (WPA) which offered work relief for thousands of people.The end to the Great Depression came about in 1941 with America's entry into World War II.America sided with Britain, France and the Soviet Union against Germany, Italy, and Japan.lack Tuesday is the day that the stock market crashed, officially setting off the Great Depression. Unemployment skyrocketed--a quarter of the workforce was without jobs by 1933 and many people became homeless. President Herbert Hoover attempted to handle the crisis but he was unable to improve the situation.