Environment and ecology

PYQ (2012-2019 papers)

• 2019 · G4 · Question 106 · Final answer key
• 2019 · G4 · Question 107 · Final answer key
• 2019 · G4 · Question 157 · Final answer key
• 2018 · G4 · Question 114 · Final answer key
• 2016 · G4 · Question 117 · Final answer key
• 2016 · VAO · Question 150 · Final answer key
• 2016 · VAO · Question 185 · Final answer key
• 2012 · G4 · Question 45 · Provisional answer key

Provisional key: until TNPSC publishes the final key; the answer may change.

Free questions

1. Question 1

   The ban the Chipko movement won in 1980 forbade felling forests in the Himalayan regions for how many years?

   1. A. 10 years
   2. B. 15 years
   3. C. 20 years
   4. D. 25 years
   Answer and explanation

   ✓ Correct answer: B. 15 years

   The Chipko movement won its greatest success in 1980, a ban on felling forests in the Himalayan regions for 15 years.

   Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 316 (PDF p. 324))

2. Question 2

   Which of the following is a non-renewable resource?

   1. A. Forests
   2. B. Groundwater
   3. C. Petroleum
   4. D. Solar energy
   Answer and explanation

   ✓ Correct answer: C. Petroleum

   Forests, crops, wildlife, groundwater, air and solar energy are renewable; minerals, coal and petroleum are non-renewable.

   Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 315 (PDF p. 323))

3. Question 3

   What are also called 'carbon sinks' because they hold carbon?

   1. A. Forests
   2. B. Fossil fuels
   3. C. Farm ponds
   4. D. Tides
   Answer and explanation

   ✓ Correct answer: A. Forests

   Forests hold carbon, so they are also called carbon sinks.

   Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 316 (PDF p. 324))

4. Question 4

   What does the word 'Chipko' mean?

   1. A. To protect
   2. B. To plant
   3. C. To cut
   4. D. To hug
   Answer and explanation

   ✓ Correct answer: D. To hug

   Chipko, the non-violent movement begun in 1973 to protect trees and forests, means 'to hug'.

   Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 316 (PDF p. 324))