Reaching the Age of Adolescence - Worksheets

CBSE Worksheet-01
Class–VIII Science (Reaching the Age of Adolescence)

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1. Which of the following is a ductless gland :-
   1. sweat gland
   2. salivary gland
   3. sebaceous gland
   4. pituitary gland
2. Adolescence brings in the individual :-
   1. mental maturity
   2. reproductive maturity
   3. emotional maturity
   4. all the above
3. In boys, voice box protrudes out in throat region and is called :-
   1. custard’s apple
   2. adam’s apple
   3. eve’s apple
   4. both b & c
4. A female secondary sexual characteristic is :-
   1. voice becoming shrill
   2. voice becoming hoarse
   3. growth of adam’s apple
   4. growth of hair on the chest
5. Match the column :-

   a. infancy	i) 11 to 12 yrs
   b. adolescence	ii) 14 to 15 yrs
   c. puberty in female	iii) from birth to 2 yrs
   d. childhood	iv) from 11 to 18 yrs
   e. puberty in male	v) 2 to 11 yrs

6. Fill in the blanks:-
   1. Time period when body undergoes changes, leading to reproductive maturity is called______.
   2. Teenagers is the other name used for ______ .
   3. At ______ sweat and sebaceous glands become more active.
   4. In girls, the first menstrual flow is called ______.
   5. As a woman grows old, menstrual cycle stops which is termed as ______.
7. What are ductless glands?
8. Define hormones and their special features?
9. Pick the odd word out of the following:
   adrenalin / amylase / thyroxine / testosterone / oestrogen
10. Write the correct words by putting letters in correct sequence-
    1. trepbuy
    2. carhenem

CBSE Worksheet-01
Class–VIII Science (Reaching the Age of Adolescence)
[Answer]

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1. d
2. d
3. b
4. a
5. a. iii, b. iv, c. i, d. v, e. ii.
6. 1. adolescence
   2. adolescents
   3. puberty
   4. menarche
   5. menopause.
7. A few glands such as sweat glands, oil glands and salivary glands release their secretions through ducts. Glands such as endocrine glands release hormones directly into the bloodstream. These glands which do not have ducts and release their secretions directly into the bloodstream are known as ductless glands. These glands secrete chemicals called hormones that act on specific targeted cells only. Example: pituatory gland.
8. Hormones are chemical substances. These are secretions from endocrine glands, or endocrine system. Hormones are needed to attain proper growth and development of our body. They are also known as chemical messengers because they carry information from endocrine glands to various parts of the body. Hormones are carried by blood to various specific target sites within the body. They are essential for body but are needed in very small quantities. Example: testosterone, progestrone etc.
9. Amylase because it is an enzyme while all others are hormones.
10. 1. puberty
    2. menarche