NCERT Important Questions Class 8 Science chapter 7 with Answer solution with pdf. Here We Provides Class 1 to 12 all Subjects NCERT Solution with Notes, Question Answer, CBSE and HBSE Important Questions, MCQ and old Question Papers for Students.
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CBSE and HBSE Solution of Class 8 Science chapter 7 Reaching the Age of Adolescence important Questions And Answer solution.
Class 8 Science Chapter 7 Important Questions and Answer
Q.1 What is adolescence? ( Most Important )
Ans – The period of life, when the body undergoes changes, leading to reproductive organs maturity is called adolescence.
Q.2 What is puberty?
Ans – Puberty is that time period of Life when the body develops all organs and the body parts. Puberty starts near 11 years old and ends at 18 – 19 years of age.
Q.3 What are the major changes during puberty?
Ans – There are the following major changes observed during puberty.
- Increase in height
- Change the body shape
- Voice Changes
- Development of sex organs
- Reaching mental, Intellectual and Emotional maturity
Q.4 What is Adam’s Apple? ( Most Important )
Ans – At puberty, the voice box or larynx begins to grow. The growing voice box can be seen in the throat is called Adam’s apple.
Q.5 What are hormones?
Ans – Hormones are the chemical substance that helps in the regulation of the body. There are many hormones for various purposes. Here are the image of some Major hormones that are found in our human body.
Q.6 Which hormones are used in reproduction?
Ans – Males hormone Testosterone and Female hormone estrogen is used in Reproduction.
Q.7 How is the sex of the baby Determined? ( Most Important )
Ans – There are two kinds of Chromosomes i.e. X and Y. Males have X and Y whereas females have X and X chromosomes. When Male X fertilise with female X Chromosome then the baby will be a girl. If the Male Y Chromosome fertilises with female X Chromosome then Baby is a boy. See images for better understanding.
Q.8 Which hormone is responsible for growth?
Ans – Growth hormone is responsible for the growth of a child. Growth hormone is secreted by the Pituitary gland.
Q.9 What is balanced diet?
Ans – A diet that is full of all nutrients like carbohydrate, protein, fat, vitamins and minerals in a balanced form is called balanced diet.
Q.10 The development of frog is controlled by which hormone?
Ans – Thyroxine hormone helps the frog for development from larva to an adult.