CTET Environmental Studies Flashcards

The Bhopal Gas Tragedy (1984) was caused by the accidental release of which toxic gas?

Answer: Methyl isocyanate (MIC)

The Bhopal disaster was caused by the accidental release of methyl isocyanate (MIC) from the Union Carbide pesticide plant.

Which of the following correctly describes the role of decomposers in an ecosystem?

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.

In CTET EVS, 'mapping' activities (drawing maps of home, school, neighborhood) help children develop:

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.

Which of the following Indian rivers is known as the 'Sorrow of Bihar'?

Answer: Kosi

The Kosi River is called the 'Sorrow of Bihar' because it frequently changes course and causes devastating floods in Bihar.

Which of the following best explains why EVS should use children's prior knowledge and home experiences?

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.

The phenomenon of 'acid rain' is primarily caused by the emission of which gases?

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.

Project Tiger in India was launched in which year to protect the Bengal tiger?

Answer: 1973

Project Tiger was launched in 1973 by Prime Minister Indira Gandhi to protect the Royal Bengal tiger from extinction.