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

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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

” CBSE Class 8 Science Chapter 7 Question and Answers “

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

” Reaching the Age of Adolescence Class 8 “

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

” Adolescence and Puberty Class 8 “

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

” Physical Changes During Puberty “

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

” Secondary Sexual Characteristics “

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

” Sex Determination in Unborn Baby “

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.

” Endocrine Glands and Hormones “

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

” CBSE Class 8 Science question and answers “

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.

” Testosterone and Oestrogen Functions “

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

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