The table below shows the data on likely heights of boys and girls as they grow in age. Draw graphs showing height and age for both boys and girls on the same graph paper. What conclusions can be drawn from these graphs?

 

Age (Years)

Height (cm)

Boys

 Girls

0

53

53

4

96

92

8

114

110

12

129

133

16

150

150

20

173

165

Answer

The graph shows the relation between age and height of both boys and girls.


Ncert Q 10 Graph - Teachoo.jpg

 

We note that during 8-12 years, girls experience a sudden growth and have more height as compared to boys. This is because puberty occurs earlier in girls(10-12 years), so they grow rapidly during this phase.

During 12-16 years,boys experience sudden grown and their height becomes the same as girls.This is because puberty occurs later in boys (12-13 years) and they grow rapidly during puberty

 

And, in later years, growth in both boys and girls become stable

 

  1. Class 8
  2. Chapter 10 Class 8 - Reaching The Age Of Adolescence

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.