Question 1

During the last half of the 20^th century,earthquakes,tsunami,and ______________ account for the majority of deaths from natural disasters.

Accepted Answer

D

Question 2

At present,the world population of humans is growing at a rate of ________% per year.

Accepted Answer

The world population growth rate is generally expressed in terms of percentage change per year. According to the United Nations, as of 2020, the world population growth rate is around 1.2% per year. This means that the world population is currently increasing by around 83 million people per year.

Question 3

At present,after subtracting deaths from births,world population increases 1.3 percent per year for a doubling time of ________________.

Accepted Answer

The doubling time can be calculated using the Rule of 70, which is 70 divided by the annual growth rate (1.3%). This gives approximately 53.85 years, which rounds to 58 years.

Question 4

The rapid increase in human population during the past several centuries is an example of ________________ growth.

Accepted Answer

Exponential growth occurs when the growth rate of a population is proportional to the current size of the population, resulting in an accelerating rate of growth over time. This is exactly what has been observed in human population growth over the past several centuries.

Question 5

The growth rate of the world population equals ______________.

Accepted Answer

The growth rate of the world population is determined by the difference between the birth rate and the death rate. If the number of births exceeds the number of deaths, the population will grow, and if the number of deaths exceeds the number of births, the population will decline. Therefore, the correct formula for calculating the growth rate is birth rate minus death rate.

Question 6

Which of the following disasters has the highest probability of causing a "10-fatality event" each year?

Accepted Answer

The answer of Which of the following disasters has the...

Question 7

Based on data for the period from 1970 to 2012,the continent of _______________ experienced the greatest loss of life from natural disasters.

Accepted Answer

According to data, Asia has experienced the greatest loss of life from natural disasters from 1970 to 2012.

Question 8

In the last 50 years of the 20^th century,world population grew from ______ billion to over 6 billion.

Accepted Answer

According to the question, world population grew from "________ billion" to over 6 billion. The range of options in the answer choices is between 2.5 and 5, so we can eliminate choices A, B, and C. Additionally, it is unlikely that the world population would only grow by a factor of 3 in 50 years, so we can eliminate choice D. Therefore, the best choice is E, 2.5 billion.

Question 9

Most of the more-developed countries have _________________.

Accepted Answer

Most of the more-developed countries have low death rates due to better health care, sanitation, and nutrition. Additionally, they also have low birth rates due to the availability of contraceptives, education on family planning, and women’s empowerment.

Question 10

Which of the following disasters has the highest probability of causing a "1,000-fatality event" each year?

Accepted Answer

According to historical data, hurricanes have the highest probability of causing a "1,000-fatality event" each year. In fact, hurricanes have caused the majority of such events in the past century.

Question 11

Based on insurance industry records of economic loss from natural disasters,32 of the 40 most expensive disasters between 1970 and 2012 were __________________ and floods.

Accepted Answer

Storms and floods are among the most common and costly natural disasters, often causing significant economic losses due to their frequency and widespread impact.

Question 12

Using the rule of 70,a population growth rate of 2% annually will result in doubling a population in __________ years.

Accepted Answer

The rule of 70 states that to find the approximate number of years it takes for a certain variable to double, divide the number 70 by the annual growth rate of that variable expressed in percentage. 
So, using the formula 70/2 = 35, we can say that a population with an annual growth rate of 2% will double in 35 years. Therefore, the correct choice is B.

Question 13

The growth of human population worldwide over the past 1000 years has been _______________.

Accepted Answer

The growth of the human population over the past 1000 years has been exponential, with periods of increasing growth rates, especially during the 20th century due to advancements in medicine, agriculture, and sanitation.

Question 14

The greatest insurance dollar losses as a result of natural disasters in the last three decades of the 20^th century occurred in ________________.

Accepted Answer

The United States has experienced the greatest insurance dollar losses as a result of natural disasters in the last three decades of the 20th century. Hurricanes, floods, wildfires, and earthquakes have all contributed to these losses.

Question 15

The present human population of the world is a little more than ____________.

Accepted Answer

According to the United Nations, the current world population as of 2021 is estimated to be approximately 7.9 billion people. Therefore, the closest option is B, which states 6 billion people.

Question 16

The return period of a disaster is the average number of years ________________.

Accepted Answer

The return period of a disaster refers to the average number of years between same-sized events. For example, if a region experiences a catastrophic earthquake once every 100 years, the return period is 100 years.

Question 17

In the last two or three centuries ___________________.

Accepted Answer

In the last two or three centuries, death rates have significantly decreased due to advancements in medicine, sanitation, and technology, while birth rates have not changed as drastically.

Question 18

The _________ century saw many of the intellectual advances that set the stage for the present phase of cultural change,with the causes of many diseases being recognized,and the principles of public health being established.

Accepted Answer

The eighteenth century was a period marked by significant intellectual advances, including the recognition of the causes of many diseases and the establishment of the principles of public health, which contributed to the foundation of modern cultural changes.

Question 19

Using the rule of 70,money invested at 7% annual interest will double in __________ years.

Accepted Answer

The rule of 70 states that you can estimate the number of years it takes for an investment to double by dividing 70 by the annual interest rate. 70 divided by 7 equals 10.

Question 20

At present,the world population of humans grows by over ______ million per year.

Accepted Answer

The world population currently grows by over 80 million per year, reflecting the difference between the number of births and the number of deaths globally.

Quiz 1: Natural Disasters and the Human Population

During the last half of the 20th century,earthquakes,tsunami,and ______________ account for the majority of deaths from natural disasters.