CBSE Class 8 Science Chapter 7 Reaching The Age Of Adolescence Question And Answers

by

Class 8 Science Chapter 7: Reaching The Age Of Adolescence Fill In the Blanks

Question 1. After attaining puberty, boys develop a voice.
Answer: Deep

Question 2. The sex hormones and oestrogen are responsible for the development of sexual characteristics.
Answer: Testosterone

Question 3. Release of sex hormones is under the control of a hormone secreted from the
Answer: Pituitary gland

Read And Learn More CBSE Class 8 Science Question And Answers

Question 4. Endocrine glands release hormones directly into……for transportation to the
Answer: Bloodstream, target site

Question 5. In females, the uterine wall thickens to receive the……
Answer: Fertilised egg

Question 6. AIDS is caused by…
Answer: Virus

CBSE Class 8 Science Chapter 7 Reaching The Age Of Adolescence Question And Answers

Question 7. The legal age for marriage is … years for girls and … years for boys.
Answer: 18,21

CBSE Class 8 Science Chapter 7: Reaching The Age Of Adolescence True/False

Question 1. Puberty starts later in girls than in boys.
Answer: False, it starts earlier in girls than in boys

Question 2. Girls have a high-pitched voice, whereas boys have a deep voice.
Answer: True

Question 3. Mood swings take place during adolescence.
Answer: True

Question 4. Oestrogen is a female hormone.
Answer: False, oestrogen is a female hormone

Question 5. Males have both X and Y chromosomes
Answer: True

Question 6. Sex hormones are under the control of hormones produced by the pituitary gland.
Answer: True

Question 7. Chromosomes are present inside the cytoplasm of every cell
Answer: False

CBSE Class 8 Science Chapter 7 Reaching The Age Of Adolescence Question And Answers

CBSE Class 8 Science Chapter 7: Reaching The Age Of Adolescence Match The Columns

Question 1. Match the hormones given in Column I with their deficiency diseases given in Column II.

CBSE Class 8 Science Chapter 7 Hormones and Their Associated Conditions

Answer: A-3, B-4, C-2, D-1

Question 2. Match Column I with Column II.

CBSE Class 8 Science Chapter 7 Matching Hormones, Glands, and Chromosomes

Answer: A-4,B-3,C-2,D-1

CBSE Class 8 Science Chapter 7: Reaching The Age Of Adolescence

1. The following questions consist of two statements: Assertion and Reason (R). Answer these questions by selecting the appropriate option given below.

  1. Both A and R are true, and R is the correct explanation of A
  2. Both A and R are true, but R is not the correct explanation of A
  3. A is true, but R is false
  4. A is false, but R is true

Answer: 10. A-4, B-3.C-2.D-1

Question 11. Assertion Menstrual cycle is controlled by hormones. Reason (R) The first menstrual flow began at puberty and is termed menarche.
Answer: Assertion Menstrual cycle is controlled by hormones. Reason (R) The first menstrual flow began at puberty and is termed menarche

Question 12. Assertion: Testosterone is a female hormone. Reason (R) It is involved in the development of the reproductive organs and controls secondary sexual characteristics

Answer: Assertion: Testosterone is a female hormone. Reason (R) It is involved in the development of the reproductive organs and controls secondary sexual characteristics.

2. The following questions consist of two assertions, find Roaton (R). Answer the following questions by selecting the appropriate option given below

  1. Both A and it are true, and it is the correct explanation of A.
  2. Both A and it are true, but K is not the correct explanation of A.
  3. A is true, but it is false.
  4. A is false, but it is true

Question 1.

Assertion: The Height of an individual is roughly comparable to that of a family member.
Reason (R): Height depends on the genes inherited from parents

Answer: Both A and R are true, and R is the correct explanation of A.

Question 2.

Assertion: Young people get acne and pimples on the face at the time of puberty.
Reason (R): It is caused due to increased activity of the adrenal gland.

Answer: A is true, but R is false. R can be corrected as Young people get acne and pimples on the face due to increased activity of sweat and sebaceous glands

Question 3.

Assertion: Exocrine glands are also called ductless glands.
Reason (R): They release hormones into blood bloodstream to reach a target site.

Answer: A is false, but R is true. A can be corrected as Endocrine glands are called ductless glands. They release hormones directly into the bloodstream to reach a target site.

Question 4.

Assertion: Diet for an adolescent has to be carefully planned.
Reason (R): Chips and packed or tinned snacks should be included in a regular meal.

Answer: A is true, but R is false. R can be corrected as the diet for an adolescent has to be carefully planned because it is a stage of rapid growth and development. Meals should include proteins, carbohydrates, fats and vitamins in requisite proportions.

Question 5.

Assertion: Teenagers should take care of their hygiene.
Reason (R): The increased activity of sweat glands makes their body smell.

Answer: Both A and R are true, and R is the correct explanation of A

Leave a Comment