NCERT Class VIII Science Solutions: Chapter 10-Reaching the age of Adolescence Part 3

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SHORT ANSWER QUESTIONS

Question 12:

Match the hormones given in Column A with their deficiency disease given in Column B.

Match the Column a and Column B (Q)
Match the Column A and Column B (Q)

Column A

Column B

Thyroxine

Salt imbalance

Growth hormone

Diabetes

Insulin

Goiter

Adrenal hormone

Dwarfism

Answer:

Match the Column a and Column B (A)
Match the Column A and Column B (A)

Column A

Column B

Thyroxine

c Goiter

Growth hormone

d Dwarfism

Insulin

b Diabetes

Adrenal hormone

a Salt imbalance

Question 13:

Lila always eats only dal and rice in every meal. She often falls ill and has become prone to diseases. Can you suggest changes in her diet which can make her healthy and free from disease?

Answer:

Lila’s diet is not a balanced diet because her meals does not contain the adequate nutritional requirement. She takes only proteins and carbohydrates in every meal. She requires to take vitamins and minerals in her meals to protect her from various diseases. Thus, I would suggest her to include fruits and vegetables in her meals.

Question 14:

Mention any two features each that are seen in boys and girls each to distinguish them from each other at puberty.

Answer:

Image of Pubertal disorders

Image of Pubertal Disorders

Image of Pubertal disorders

Two features seen in boys at puberty are:

  1. Growth of facial hairs

  2. Voice becomes hoarse.

Two features seen in girls at puberty are:

  1. Development of breasts.

  2. Region below the waist becomes wider.

Question 15:

We should avoid taking medicines/drugs unless prescribed by a doctor. Give reasons.

Answer:

Several medicines have adverse side effects and have specific dosage levels which if not followed may harm the body. Drugs can be addictive too and can ruin our health and happiness.

Question 16:

A few of Paheli’s classmates eat potato chips and burgers regularly during the recess at school. Are they healthy eating habits? Give reasons.

Answer:

No. They are not healthy eating habits because potato chips and burgers have very little nutritional value.