CTET CTET Environmental Studies 5 — Questions and Answers
Question 1: The Bhopal Gas Tragedy (1984) was caused by the accidental release of which toxic gas?
- Chlorine gas
- Methyl isocyanate (MIC) (Correct answer)
- Sulfur dioxide
- Ammonia
Correct answer: Methyl isocyanate (MIC)
The Bhopal disaster was caused by the accidental release of methyl isocyanate (MIC) from the Union Carbide pesticide plant.
Question 2: Which of the following correctly describes the role of decomposers in an ecosystem?
- They produce food through photosynthesis
- They consume only plants
- They break down dead organic matter and return nutrients to soil (Correct answer)
- They are the top predators in food chains
Correct answer: They break down dead organic matter and return nutrients to soil
Decomposers like bacteria and fungi break down dead organic matter, recycling nutrients back into the soil for producers to use.
Question 3: In CTET EVS, 'mapping' activities (drawing maps of home, school, neighborhood) help children develop:
- Arithmetic skills only
- Spatial thinking and understanding of their immediate environment (Correct answer)
- Reading fluency
- Historical knowledge
Correct answer: Spatial thinking and understanding of their immediate environment
Mapping activities develop spatial thinking, observation, and help children understand relationships between places in their environment.
Question 4: Which of the following Indian rivers is known as the 'Sorrow of Bihar'?
- Ganga
- Kosi (Correct answer)
- Yamuna
- Brahmaputra
Correct answer: Kosi
The Kosi River is called the 'Sorrow of Bihar' because it frequently changes course and causes devastating floods in Bihar.
Question 5: Which of the following best explains why EVS should use children's prior knowledge and home experiences?
- It reduces the teacher's workload
- It connects formal learning to lived experiences, making concepts meaningful (Correct answer)
- It eliminates the need for textbooks
- It is required only for rural schools
Correct answer: It connects formal learning to lived experiences, making concepts meaningful
Using prior knowledge and home experiences makes EVS concepts personally relevant and supports constructivist learning.
Question 6: The phenomenon of 'acid rain' is primarily caused by the emission of which gases?
- Oxygen and nitrogen
- Sulfur dioxide and nitrogen oxides (Correct answer)
- Carbon dioxide and methane
- Ozone and argon
Correct answer: Sulfur dioxide and nitrogen oxides
Acid rain is caused by sulfur dioxide and nitrogen oxides reacting with atmospheric water to form sulfuric and nitric acids.
Question 7: Project Tiger in India was launched in which year to protect the Bengal tiger?
- 1965
- 1973 (Correct answer)
- 1980
- 1992
Correct answer: 1973
Project Tiger was launched in 1973 by Prime Minister Indira Gandhi to protect the Royal Bengal tiger from extinction.
CTET CTET Environmental Studies 5
The Bhopal Gas Tragedy (1984) was caused by the accidental release of which toxic gas?