9th Social Science Lesson 17
17] Man and Environment
Book Back Questions with Answer and Do You Know Box Content
Do You Know?
The Stockholm Conference, 1972, declared man as both a creator and moulder of his environment. “The Earth Summit”, formally known as the United Nations Conference on Environment and Development (UNCED) was held in Rio Janeiro in 1992.
Census: Census is an official enumeration of population carried out periodically. It records information about the characteristics of population such as age, sex, literacy and occupation. Different countries of the world conduct census every 5 to 10 years as recommended by the United Nations. The first known census was undertaken nearly six thousand years ago by the Babylonians in 3800 BC (BCE) . Denmark was the first country in the modern world to conduct a census. In India, the first census was carried out in the year 1872. Censuses have been conducted regularly every tenth year since 1881. The Indian Census is the most comprehensive source of demographic, social and economic data. Have you ever seen a census report? Check in your library.
What is Demography? In ancient Greek, “demos” means people and “graphis” means study of measurement. So, “Demography” is the statistical study of human population.
The World Population Day is observed on 11th July every year. It seeks to raise awareness of global population issues. The United National Development Programme started celebrating this event from the year 1989.
The Black Death is estimated to have killed 30-60 percent of Europe’s total population during the 14th century. The dominant explanation for Black Death is attributed to the outbreak of plague.
Over Population and Under Population: Over population is a condition when a country has more people than its resources to sustain. Under population is a condition where there are too few people to develop the economic potential of a nation fully.
“India has an official population policy implemented in 1952. India was the first country to announce such a policy. The main objective of this policy was to slow down the rate of population growth, through promotion of various birth control measures.
Damascus is widely believed to be the oldest, continuously inhabited city in the world, dating back to at least 11,000 years. Tokyo is the world’s largest city with the greater Tokyo area, housing about 38 million inhabitants. According to the Quality of Living Rankings by Consultancy Mercer, in 2016, the city offering the best quality of life was Vienna, with Zurich falling second.
How to help the value of sustainability grow among students? Lifestyle: Your lifestyle is your choice and you can change it. For example, when you go to the grocery store, make sure you always carry a cloth bag. This way the shopkeeper does not have to give you many plastic bags.
Fixing: If your watch or a toy or a camera is broken or not working, try getting it fixed before you buy yourself a new one.
Recycle: Try and be conscious about the things around you. When you consume something, see if you can re-use it later.
Needs vs Wants: Before you buy something, ask yourself the question – do I NEED this or do I WANT it? Remember sustainability begins with you. So act locally and think globally.
Choose the best answers:
1. All external influences and factors that affect the growth and development of living organisms is ______________
(c) Biotic factors
(d) Abiotic factors
2. The “World Population Day” is observed on _____________ every year.
(a) August 11th
(b) September 11th
(c) July 11th
(d) January 11th
3. The statistical study of human population is _______________
4. The extraction of valuable minerals and other geological minerals from the mines, is ___________
5. The Secondary Sector of the economy produces _____________ from raw materials.
(a) Semi finished goods
(b) Finished goods
(c) Economic goods
(d) Raw materials
Match the following:
1. Loudspeaker – Noise pollution
2. Rio de Janeiro Brazil – T-shaped settlement
3. Cruciform settlement – Earth summit, 1992
Consider the following the statements and tick the appropriate answer:
1. Assertion (A): Ozone layer in the stratosphere is considered as a protective shield.
Reason (R): It prevents the UV radiation from reaching the earth’s surface.
(a) A and R is correct and A explains R
(b) A and R is correct, but A does not explain R
(c) A is incorrect but R is correct
(d) Both A and R is incorrect
2. Assertion (A): In tertiary activities, instead of producing goods by themselves, they are in the process of production.
Reason (R): People in Tertiary activities are purely eco-friendly.
(a) Both A and R is incorrect
(b) A and R is correct but A does not explain R
(c) A is correct and R is incorrect
(d) A and R is correct and A explains R
Choose the best answers:
1. Environment 2. July 11th 3. Demography 4. Mining 5. Finished goods
Match the following:
1. Noise pollution 2. Earth summit, 1992 3. T-shaped settlement
Consider the following statements and choose the correct answer:
1. A and R is correct and A explains R
2. A is correct and R is incorrect