Elizabeth Kubler-Ross proposed ________ in her stages of death and dying.

The immune response declines with age.

Depression is the most common problem of adolescence.

The two types of Alzheimer’s disease are _____________.

Middle-aged adults who must care for multiple generations above and below them at the same time are known as the ____________________.

Heredity contributes substantially to the timing of pubertal changes.

The earliest known use of the term Manifest Destiny in 1845 was by ___________________________. 

How much did the United States pay for the acquisition of Alaska from Russia? Sewards folly.png 

What was the underlying cause for the U.S. Mexican War (1846-1848)? 

In 1898, the United States acquired the following territories as a result of the Spanish-American war.