
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

ICSE Class X Notes 2026 : Biology (St. John's High School, Bangalore)

2 pages, 0 questions, 0 questions with responses, 0 total responses,

	Shawn Mammen Mathews	+Fave Message
	Profile Timeline Uploads

Home > georgie_rosh > F Also featured on: School Page

Formatting page ...

Population Population It refers to number of species iving in a specific area at a given time. Population Explosion in India It refers to the rapid increase in population due to a significant decrease in death rates and increase in birth rates. Terms Related to Population i Population Density Number of individuals living per unit area. Birth Rate (Natality) Number of live births per 1,000 people per year. Death Rate (Mortality) Number of deaths per 1,000 people per year. Growth Rate Difference between birth rate and death rate. Demography Statistical study of The major causes of population explosion are Lack of awareness about reproduction and family planning, especially in rural areas. High natality rate and desire for a male child. Traditional belief that children are a sign of prosperity. Low economic conditions and religious customs. Population Control It involves measures to regulate the population growth. The methods involved are Improved Education Facilities Educating society about population explosion promotes informed decisions. Sex Education Promotes responsibie behaviour and family planning. Marriageable Age Raising the marriageable age delays childbirth. In India, it is 21 years for boys and 18years for girls. Family Planning Introduced in 1951 in India under the Ministry of Health and Family Welfare to provide advice and help about family planning. population size, composition and Use of Contraception Prevent distribution. unintended pregnancies and control population growth. Contraception (Birth Control) it refers to the use of methods, devices or drugs to prevent pregnancy. Surgical methods are permanent methods of contraception that include Vasectomy Performed in males. Vas deferens is cut and tied to prevent spern transfer. Tubectomy Performed in females. Fallopian tube is cut and tied to prevent egg from meeting sperms. limited job opportunities. Natural resources are overexploited Fallopian tubes cut and tied Fallopian tube Vas deferens cut and tied due to increased demand. Unequal wealth distribution increases social and economic Uterus Testis Vasectomy Effects of Population Explosion Unemployment increases due to Ovary disparities. Per capita income decreases due to limited resources and employment. Prices of goods rise due to increased demand. Tubectomy Alr, water, soll and land pollution increase due to human activities. Pollution Waste It refers to any unwantedthe material discarded into environment. cause When these materials harmful effects, they are Types of Pollutlon Pollution is of various types, such as air, water, soil, noise and radioactive pollution. that cannot be decomposed by microorganisms, such as piastics, glass, styrofoam and DDT. SO, and nitrogen oxides dissolve in water droplets, forming acid rain. It monuments. Greenhouse Effect and Global Air Pollution Biodegradable Wastes that can be decomposed by microorganisms, such as paper andvegetable peels. Non-biodegradable Wastes Acld Rain damages aquatic life, vegetation and called pollutants. Types of Waste Effects of Pollution on Climate Harmful gases or particles that degrade air quality cause air pollution. Sources Vehicles, industries, garbage burning, brick kilns. Warming CO, and CH, trap heat in the atmosphere, causing the greenhouse effect. Their increased concentration raises Earth's average temperature, causing global warming. Ozone Layer Depletion CFCs reduce the ozone layer, allowing more UV-B radiation to reach Earth. It damages DNA, skin Water Pollution and eyes. Degradation of water quality by harmful inorganic, organic or biological substances. Noise Pollution Sources Detergents, sewage, industrial waste, oil spills. Unwanted or excessive sound that disturtbs living organisms. Sources Vehicles, industries, Construction sites, loudspeakers. Soil Pollution Undesirable changes in soil quality that affect productivity and living organisms. Sources Industrial waste, urban waste, chemical fertilisers, biomedical waste. Radioactive Pollution Contamination by harmful radioactive substances emitting a, B and y rays Sources X-rays, nuclear plants, nuclear fallout, unsafe waste disposal. Measures to Control Pollution Using unleaded petrol and CNG Switching off engines at traffic signals Social forestry Sewage treatment Banning polythene and plastics Organic farming Vehicular emission standards

Formatting page ...

georgie_rosh chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: