Cambridge Secondary (7-9). Stage 8. Science. Learner's Book - Unit 7: Diet and growth - Question 46

This bar chart shows the percentages of babies with a birthweight lower than normal, born to mothers who smoked different numbers of cigarettes per day while they were pregnant.

Use the information in the bar chart to answer these questions.

Describe how smoking during pregnancy affects the chance of having a baby with a low birthweight.