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Class 8 Science Chapter 7 HOTS Questions - Reaching the Age of Adolescence

Q1. The period of life, when the body undergoes changes, leading to reproductive maturity, is called:

A. Childhood
B. Adolescence
C. Grown up
D. Old age
Ans: B. Adolescence

Explanation: Adolescence is the period between childhood and adulthood when the body undergoes changes to become reproductively mature.

Q2. The human body undergoes several changes during adolescence. These changes mark the onset of:

A. Puberty
B. Prematurity
C. Post adolescence
D. Ageing
Ans: A. Puberty

Explanation: Puberty refers to the changes during adolescence that prepare the body for reproduction.

Q3. Adam’s apple is prominent in:

A. Boys of any age
B. Adolescent girls
C. Girls of any age
D. Adolescent boys
Ans: D. Adolescent boys

Explanation: The Adam’s apple, a noticeable bump in the throat, appears prominently in adolescent boys as their larynx grows, deepening the voice.

Q4. Larynx is also called:

A. Voice box
B. Sound box
C. Black box
D. All of the above
Ans: A. Voice box

Explanation: The larynx, or voice box, is responsible for producing sound and is located in the throat.

Q5. Acne and pimples on the face are due to secretion of:

A. Bile from liver
B. Oil glands during puberty 
C. Enzymes in the digestive tract
D. Tear from tear glands
Ans: B. Oil glands during puberty

Explanation: During puberty, oil glands increase their activity, which can block pores and result in acne.

Q6. Testosterone is a hormone found in human:

A. Children
B. Males and females
C. Females only
D. Males only
Ans: B. Males and females

Explanation: Testosterone, though mainly a male hormone, is found in both males and females, influencing development in both sexes.

Q7. The first menstrual flow is called:

A. Menstruation
B. Mensuration
C. Menarche 
D. Menopause
Ans: C. Menarche

Explanation: Menarche is the term for the first menstrual period, marking the beginning of reproductive maturity in girls.

Q8. Menopause occurs at the age of:

A. 10-12 years in boys
B. 45-50 years in men
C. 10-12 years in girls
D. 45-50 years in women
Ans: D. 45-50 years in women

Explanation: Menopause, typically occurring between 45-50 years, is when a woman’s menstrual cycle ends.

Q9. When a sperm containing a Y chromosome fertilizes an egg with an X chromosome, the zygote develops into a:

A. Female
B. Either a male or female
C. Male 
D. No child
Ans: C. Male

Explanation: A combination of an X chromosome from the egg and a Y chromosome from the sperm results in a male child (XY).

Q10. The change from larvae to adult is called:

A. Metabolism
B. Metamorphosis
C. Metastasis
D. Morphology
Ans: B. Metamorphosis

Explanation: Metamorphosis is the process by which an organism transforms from a larva to its adult form, as seen in species like frogs and butterflies.


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FAQs on Class 8 Science Chapter 7 HOTS Questions - Reaching the Age of Adolescence

1. What are the physical changes that occur during adolescence?
Ans. During adolescence, individuals experience significant physical changes due to hormonal changes. These changes include growth spurts, development of secondary sexual characteristics, such as breast development in girls and facial hair in boys, and changes in body composition, including increased muscle mass in boys and fat distribution in girls.
2. How do emotional changes impact adolescents?
Ans. Adolescents often experience heightened emotions and mood swings due to hormonal fluctuations and the challenges of developing identity. They may feel more intense feelings of happiness, sadness, or anger, and this emotional volatility can affect their relationships with peers and family.
3. What role do peer relationships play in adolescence?
Ans. Peer relationships become increasingly important during adolescence as individuals seek acceptance and belonging. Friends influence behaviors, interests, and self-esteem, and adolescents often rely on their peers for support and validation as they navigate this transitional stage.
4. How can parents support their children during adolescence?
Ans. Parents can support their children during adolescence by maintaining open lines of communication, being empathetic, and providing guidance while allowing for independence. It's essential for parents to listen to their concerns and validate their feelings, fostering a supportive environment.
5. What are the common health issues faced by adolescents?
Ans. Common health issues faced by adolescents include mental health concerns such as anxiety and depression, substance abuse, and issues related to nutrition and physical activity. It's important for adolescents to have access to health education and resources to address these challenges.
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