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Tamil Nadu SSLC (Class 10) Unit 8B: Population Ecology & Environmental Systems — practice questions

Explore 11 free Unit 8B: Population Ecology & Environmental Systems questions in Tamil Nadu SSLC (Class 10) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 8B: Population Ecology & Environmental Systems questions and exercises with answers

Showing questions 1–11 of 11.

Resources such as forests, wildlife, wind and solar energy, which can replenish themselves naturally, are classified as:Read the answer and worked solution →The Chipko movement of 1973 was a non-violent agitation aimed at:Read the answer and worked solution →The removal of the upper, fertile layer of soil by the action of wind and water is called:Read the answer and worked solution →The Wildlife Protection Act in India was established in which year?Read the answer and worked solution →Solar cells (photovoltaic devices) generate electricity because they are made of silicon that:Read the answer and worked solution →Biogas, commonly called 'Gobar gas', is produced by the decomposition of animal and plant wastes in the:Read the answer and worked solution →Which statement about wind energy is INCORRECT?Read the answer and worked solution →The technique of collecting and storing rainwater so that it percolates underground to recharge the groundwater is known as:Read the answer and worked solution →In Tamil Nadu, the traditional interconnected tanks or lakes used to harvest and divert rainwater between villages are called:Read the answer and worked solution →Which method of solid-waste disposal involves digesting biodegradable matter by microbes or earthworms to form humus?Read the answer and worked solution →Which toxic metal present in e-waste is specifically noted to damage the central and peripheral nervous system and affect brain development in children?Read the answer and worked solution →

Worked practice questions

Resources such as forests, wildlife, wind and solar energy, which can replenish themselves naturally, are classified as:

  1. Non-renewable resources
  2. Fossil fuels
  3. Conventional resources
  4. Renewable resources
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Correct answer: D. Renewable resources

1. Resources that renew themselves through natural recycling or good management are renewable. 2. Forests, wildlife, wind and solar energy are given as examples of renewable resources. 3. Mineral ores, coal and petroleum are non-renewable fossil fuels, so A, B and C are traps. 4. Hence the answer is D. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Environmental Management", p.322_

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The Chipko movement of 1973 was a non-violent agitation aimed at:

  1. Protecting and conserving trees
  2. Preventing the hunting of wild animals
  3. Stopping the construction of large dams
  4. Harvesting rainwater in villages
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Correct answer: A. Protecting and conserving trees

1. The Chipko movement, from the word 'embrace', had villagers hugging trees. 2. Its aim was the protection and conservation of trees, achieving a ban on tree-felling in Himalayan forests. 3. It was not about hunting, dams or rainwater, so B, C and D are traps. 4. Hence the answer is A. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Environmental Management", p.323_

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The removal of the upper, fertile layer of soil by the action of wind and water is called:

  1. Soil erosion
  2. Deforestation
  3. Desertification
  4. Afforestation
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Correct answer: A. Soil erosion

1. The top soil layer holds humus and mineral salts vital for plant growth. 2. Its removal by wind and water is defined as soil erosion, which lowers soil fertility. 3. Deforestation is loss of forests, desertification is land turning to desert, and afforestation is planting trees, so B, C and D are wrong. 4. Hence the answer is A. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Environmental Management", p.325_

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