Question

turn to page 8. find figure 4. human population growth. in the graph, you can see a little dip in human population, around the year 1500. 5) what caused this dip in human population? 6) the text mentions 7.8 billion people, but the textbook was published in 2021. our current human population is about 8.2 billion people. how many years has it taken to add 400 million people to earth? in the top paragraph, find the sentence that starts with “we add about 78 million people to the planet each year.....”. 7) how many more people is that each day?

Explanation:

Step1: Identify the cause of population dip

The dip around 1500 was mainly due to the Black - Death pandemic. It was a devastating plague that killed a large number of people across Europe and other regions.

Step2: Calculate years for population increase

The population increased from 7.8 billion to 8.2 billion (an increase of 400 million). If we assume a constant growth rate (from the given information of 78 million people added per year), we use the formula $years=\frac{400}{78}\approx 5.13$. Since we are dealing with whole - year increments, we can say it took about 5 years.

Step3: Calculate daily population increase

There are 365 days in a year. To find the daily increase, we divide the annual increase (78 million) by 365. So, $\frac{78000000}{365}\approx 213699$ people per day.

Answer:

1. The Black - Death pandemic.
2. About 5 years.
3. Approximately 213699 people.