Population Growth and Doubling Time

The video tutorial explains how to calculate population growth rates using the crude birth and death rates, and introduces the Rule of 70 for determining population doubling time. It covers examples of global and metropolitan population growth, including the impact of migration. The tutorial emphasizes converting rates to percentages and provides a practical application of the Rule of 70.

What is the formula for calculating the global population growth rate?

• Crude birth rate divided by crude death rate

• Crude birth rate plus crude death rate

• Crude death rate minus crude birth rate

• Crude birth rate minus crude death rate

Why do we divide by 10 when converting rates per 1,000 to percentages?

• To convert from per 100 to per 1,000

• To convert from per 10,000 to per 1,000

• To convert from per 1,000 to per 10,000

• To convert from per 1,000 to per 100

In a metropolitan area, what additional factors are considered in the growth rate formula?

• Neither immigration nor emigration

• Immigration and emigration

• Only immigration

• Only emigration

How do you express 2,000 births per 100,000 people in terms of per 1,000?

• 0.2 per 1,000

• 2 per 1,000

• 200 per 1,000

• 20 per 1,000

What is the growth rate if the crude birth rate is 20, immigration is 1, crude death rate is 5, and emigration is 2?

• 1.4%

• 2.1%

• 0.7%

• 1.2%

What is the Rule of 70 used for?

• Calculating immigration rates

• Calculating death rates

• Calculating birth rates

• Calculating population doubling time

How long will it take for a population to double at a growth rate of 2%?

• 25 years

• 70 years

• 50 years

• 35 years

If a population doubles in 35 years, what is the growth rate?

• 1%

• 3%

• 4%

• 2%

What is the significance of the number 70 in the Rule of 70?

• It is the average number of births per 1,000

• It represents the average life expectancy

• It is a constant used to calculate doubling time

• It is the average number of deaths per 1,000

What happens to a population in 35 years if the growth rate is 2%?

• It halves

• It triples

• It doubles

• It remains the same