When the birth rate is more than the death rate between two points of time it is known as:
Positive Population growth
Understanding Population Growth
Population growth refers to the change in the number of individuals in a population over time. This change is primarily influenced by the balance between the birth rate and the death rate within a specific area over a given period. It can also be affected by migration (people moving in or out).
Defining Birth Rate and Death Rate
- Birth Rate: The number of live births per 1,000 people in a population per year.
- Death Rate: The number of deaths per 1,000 people in a population per year.
Analyzing Population Change Based on Rates
The relationship between the birth rate and the death rate determines the natural rate of population change. There are three main scenarios:
- Birth rate > Death rate: When the number of births is higher than the number of deaths, the population naturally increases. This leads to positive population growth.
- Birth rate < Death rate: When the number of deaths is higher than the number of births, the population naturally decreases. This results in negative population growth, which can lead to depopulation.
- Birth rate = Death rate: When the number of births is roughly equal to the number of deaths, the population remains relatively stable. This is known as zero population growth (in terms of natural change).
The question asks what happens when the birth rate is more than the death rate between two points in time. Based on our analysis, this specific condition directly causes the population to increase, defining it as positive population growth.
Evaluating the Given Options
Let's look at the options provided:
- Economic growth: This relates to the increase in the production of goods and services in an economy. While population growth can influence economic growth, and vice versa, they are distinct concepts. This option is incorrect.
- Negative Population growth: This occurs when the death rate is higher than the birth rate (or when emigration exceeds immigration significantly). This is the opposite of the condition described in the question. This option is incorrect.
- Positive Population growth: This occurs when the birth rate is higher than the death rate (and/or when immigration exceeds emigration). This exactly matches the condition given in the question. This option is correct.
- Depopulation: This refers to a significant decline in population size. It is a consequence of prolonged negative population growth. This option is incorrect as the question describes a situation leading to population increase, not decrease.
Therefore, when the birth rate is more than the death rate between two points of time, it is known as positive population growth.
| Scenario | Relationship | Resulting Population Change |
|---|---|---|
| Positive Growth | Birth Rate > Death Rate | Increase in Population |
| Negative Growth | Birth Rate < Death Rate | Decrease in Population |
| Zero Growth (Natural) | Birth Rate = Death Rate | Stable Population (Natural Change) |
Revision Table: Population Dynamics Key Terms
| Term | Definition |
|---|---|
| Birth Rate | Number of live births per 1000 people per year. |
| Death Rate | Number of deaths per 1000 people per year. |
| Natural Growth Rate | Birth Rate - Death Rate. Represents population change excluding migration. Expressed as a percentage. |
| Population Growth Rate | Includes natural growth rate and net migration (immigration - emigration). Represents the total change in population. |
| Positive Population Growth | Population increases over a period. |
| Negative Population Growth | Population decreases over a period. |
| Depopulation | Significant decline in population. |
Additional Information: Factors Affecting Population Growth
Population growth is a complex phenomenon influenced by numerous factors:
- Fertility Rates: The average number of children born to a woman over her lifetime. Higher fertility rates contribute to higher birth rates.
- Mortality Rates: Influenced by factors like healthcare quality, sanitation, nutrition, and prevalence of diseases. Lower mortality rates (especially infant mortality) contribute to lower death rates and higher life expectancy.
- Migration: The movement of people into (immigration) or out of (emigration) a region significantly impacts population size and growth rate, especially in smaller areas.
- Socio-economic Factors: Education levels, economic development, access to family planning, cultural norms, and government policies all play a role in influencing birth and death rates.
- Environmental Factors: Availability of resources, climate change, and natural disasters can affect mortality and migration patterns.
The natural rate of increase is calculated using the formula:
\(\text{Natural Growth Rate} = \left( \frac{\text{Birth Rate} - \text{Death Rate}}{10} \right)\%\)
For example, if the birth rate is 20 per 1000 and the death rate is 10 per 1000, the natural growth rate is \(\left( \frac{20 - 10}{10} \right)\% = \left( \frac{10}{10} \right)\% = 1\%\). This means the population is increasing by 1% per year due to natural change.
Important Questions from The World Population : Distribution Density and Growth
Direction (Q41. to Q45) Read the given passage carefully and answer following five questions.
High technology, or simply high-tech, is the latest generation of manufacturing activities. It is best understood as the application of intensive research and development (R and D) efforts leading to the manufacture of products of an advanced scientific and engineering character. Professional (white collar) workers make up a large share of the total workforce. These highly skilled specialists greatly outnumber the actual production (blue collar) workers.
Robotics on the assembly line, computer-aided design (CAD) and manufacturing, electronic controls of smelting and refining processes, and the constant development of new chemical and pharmaceutical products are notable examples of a high-tech industry. Neatly spaced, low, modern dispersed, office-plant-lab building rather than massive assembly structures, factories and storage areas mark the high-tech industrial landscape. Planned business parks for high-tech start-ups have become part of regional and local development schemes.
High-tech industries which are regionally concentrated, self-sustained and highly specialized are called technopolies. The Silicon Valley near San Francisco and Silicon Forest near Seattle are examples of technopolies. Are some technopolies developing in India?
Manufacturing contributes significantly to the world economy. Iron and steel, textiles, automobile, petrochemical and electronics are some of the world’s most important manufacturing industries.
The highly skilled professionals are called the workers of.
CBR (Crude Birth Rate) is calculated as.
Identify the important features related to History of Indian Air transport.
A. Air transport in India was launched between Allahabad and Naini
B. Air transport was nationalised in 1953
C. Air transport in India made a beginning in 1915
D. Air transport was provided by four major companies
Choose the correct answer from the options given below:
Arrange the following major ports on the Eastern Coast of India, from North to South direction:
A. Chennai
B. Paradwip
C. Haldia
D. Vishakhapatnam
Choose the correct answer from the options given below:
Identify the correct statements with respect to influence on the distribution of population.
(A) The mountainous and hilly areas hinder the development of transport networks, hence sparse population is found
(B) All major cities are located in fertile alluvial plains
(C) Areas with comfortable climate attract more people
(D) In Katanga Zambia copper belt, mining is the main reason for its high population density.
Choose the correct answer from the options given below:
