8th Science NCERT Chapter 7
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Topics to study from the chapter:
1. Adolescence and Puberty
– Adolescence is the period when the body undergoes changes leading to reproductive maturity, usually beginning around age 11 and lasting up to 18-19 years.
2. Changes at Puberty
– Increase in Height: Sudden growth in height due to elongation of long bones.
– Change in Body Shape: Broadening of shoulders in boys and widening of lower body in girls.
– Voice Change: Boys experience voice changes as the voice box grows.
– Development of Sex Organs: Male and female sex organs undergo development at puberty.
3. Reaching Mental, Intellectual, and Emotional Maturity
– Adolescents experience changes in thinking, become more self-conscious, and go through intellectual development.
4. Secondary Sexual Characters
– Development of secondary sexual characters like breast development in girls and voice changes in boys7.
What is the period of life when the body undergoes changes leading to reproductive maturity known as?
At what age does adolescence generally begin for girls and boys?
What is the most important change that marks puberty in boys and girls?
How do the changes in height differ between boys and girls during puberty?
What changes occur in the voice of adolescent boys at puberty?
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