According to Research Cited in the Text, in 2009 About

question 133

True/False

According to research cited in the text, in 2009 about one-third of 9th graders and two-thirds of 12th graders reported that they were sexually active.

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Definitions:

Calorie Restriction

The practice of limiting dietary energy intake (while consuming sufficient quantities of vitamins, minerals, and other important nutrients) for the purpose of improving health and slowing down the aging process.

Aging

The process of becoming older, which involves a number of biological, psychological, and social changes over time.

Maximum Life Span

The oldest possible age that members of a species can live under ideal circumstances. For humans, that age is approximately 122 years.

Life Expectancy

The average number of years an individual is expected to live, based on statistical averages of age-specific death rates.