Page 15 - 新思维科学活动用书6 样章
P. 15
1 The human body
Challenge
3 A scientist carried out a study with 100 girls to find out the age at which they started
puberty.
This is a graph of her findings.
40
35
30
Number of girls 25
20
15
10
5
0
9 10 11 12 13 14 15
Age in years
a Describe three signs in girls that puberty has started.
b i At what age did most of the 100 girls start puberty?
ii How many girls started puberty at this age?
14
