Puberty began for Molly when she was 9 years old.Her mother began puberty at 11 years.For her grandmother,the onset was at 13 years of age.These changes in the age of the onset of puberty over time are referred to as a _____ trend.

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Quizplus · Accepted Answer

The changes in the age of the onset of puberty over time are referred to as a secular trend. A secular trend refers to a long-term, gradual change in a population's characteristics or traits, such as height, weight, or age of puberty onset, due to environmental or societal factors. The fact that Molly, her mother, and her grandmother began puberty at different ages suggests that there has been a secular trend in the age of puberty onset over the years.

Puberty Began for Molly When She Was 9 Years Old