CBSE Class 8 Science Reaching the age of Adolescence Assignment Set B

CBSE Class 8 Science - Reaching the age of Adolescence (2)

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Q1. What is adolescence?

A1. It is the period of life when the body undergoes changes, leading to reproductive maturity.

Q2. Define puberty.

A2. The stage when human body becomes sexually mature.

Q3. Enlist the changes occurring in males and females during puberty.

A3.

Type of change In girls In boys

Increase in height Sudden in crease Sudden in crease

Body shape Waist widens Shoulders broadens

Voice change High pitched Voice becomes deeper

Development of sex organs Ovaries mature and releases

eggs.

Testes maturesand produces

sperms

Q4. What is adam’s apple?

A4. The growing voice box in boys can be seen as a protruding part of the throat called adam’s apple.

Q5. What are secondary sexual characters?

A5. These are the features that help to distinguish males from females.

Q6. Define the following terms.

1. Hormone- they are chemical messengers for various processes and activities in the body

2. Endocrine glands- the ductless glands which secrete hormones directly into blood.

Q7. What is the role of hormones in initiating reproductive function?

A7. 1. Hormones from pituitary stimulate testes and ovaries to release testosterone and estrogen

respectively.

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