Human population growthIB MYP Biology: Mind map

Exam questions on Human population growth

1. A country in South-East Asia introduced free vaccination for children, clean piped water and better farming methods in the 1960s. Its death rate fell quickly, but its birth rate stayed high for several decades. The population doubled in about 40 years.
   Explain how the vaccination programme helped the population to grow.2 marks
2. A coastal city in Vietnam grew from 1 million to 4 million people in 40 years. Mangrove forests and farmland around the city were cleared to build housing and factories. The city now produces much more household waste and uses far more water from the local river.
   Explain why the growing population puts pressure on the city's water supply.2 marks
3. Demographers estimate that the world's human population was about 1 billion in 1800, about 2.5 billion in 1950 and about 8 billion in 2022.
   Describe how the rate of growth of the world's human population has changed.3 marks