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Important Short Questions and Answers: Human Population and the Environment

Environmental Science and Engineering - Important Short Questions and Answers: Human Population and the Environment


Human Population and the Environment

 

1. Define Population explosion.

 

Unprecedented growth of human population at an alarming rate is defined as population explosion. For, e.g. Between 1950-1990, in just 40 years the population crossed 5billion mark with current addition of about 92 million every year.

 

2. What is value education? Give its significance.

 

Value education is an instrument used to analyse our behavior and provide proper direction to our youths.it teaches them the distinction between right and wrong, to be compassionate,helpful,loving,generous and tolerant.so that a youth can move towards the sustainable future.

 

3. What do you mean by Doubling Time?

 

The doubling time is the period of time required for a quantity to double in size or value. It is generally applied to denote the population growth.

 

4. State the role of Information Technology in Environment.

 

It plays a vital role in the field of environmental education. IT means collection, processing, storage, and dissemination of information. A number of software have been developed to study about the environment.

 

5. What is meant by remote sensing?

 

Remote sensing refers to any method which can be used to gather information about object without actually coming in contact with it.

 

6. What is meant by GIS?

 

·        A geographic information system (GIS), also known as a geographical information system, is an information system for capturing, storing, analyzing, managing and presenting data which is spatially referenced (linked to location).

 

·        In the strictest sense, it is any information system capable of integrating, storing, editing, analyzing, sharing, and displaying geographically referenced information.

 

7. Define Human Rights.

 

Human rights refer to the "basic rights and freedoms to which all humans are entitled. Examples of rights and freedoms which are often thought of as human rights include civil and political rights, such as the right to life and liberty, freedom of expression, and equality before the law; and social, cultural and economic rights, including the right to participate in culture, the right to food, the right to work, and the right to education. All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and should act towards one another in a spirit of brotherhood.

 

8. How does HIV transmitted?

 

·        HIV transmits through blood contact, sexual fluids, using same needles or syringes.

·        HIV can also pass from infected mothers to babies during pregnancy.

 

7. Name the major precautions to avoid AIDS

·        Education.

·        Prevention of blood borne HIV transmission.

·        Primary health care.

 

 

 

8. What are objectives of family welfare programme?

 

·        Slowing down the population explosion by reducing the fertility.

·        Due to pressure, over exploitation of natural resources reduced.

 

9. What is value education?

 

Value education is an instrument used to analyze our behavior and proper direction to our youths. It teach them the distinction between right and wrong to be compassionate, helpful, loving, generous and tolerant.

 

10. What is meant by remote sensing?

 

Remote sensing refers to any method which can be used to gather information about object without actually coming in contact with it.

 

11. What is crude fertility rate?

 

The general fertility rate indicates the number of live born children per 1,000 women of the mean population aged 15 to 49.

 

12.            What do you mean by Total fertility rate, Zero population growth?

 

·        Total fertility rate is defined as the average number of children that would be born to a woman in her lifetime if the age specific birth rates remain constant.

 

·        When birth plus immigration in a population are just equal to deaths plus emigration, it is said to be zero population growth.

 

13.            What are the types of population growth curves?

(i) Pyramid shaped; (ii) Bell shaped & (iii) Urn shaped

 

14.            What is meant by Life expectancy?

 

It is the average age that a newborn infant is expected to attain in a given country. The average life expectancy, over the globe, has risen from 40 to 65.5 years over the past century. In India, life expectancy of males and females was only 22.6 years and 23.3 years, respectively in 1900.

 

15.            What are the post and preindustrial phases of demographic transition?

 

·        Preindustrial phase characterized by high growth and death rates and net population growth is low.

 

·        Post industrial phase during which zero population growth is achieved.

 

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