Free Environment and Atmosphere MCQs with Answers

191. What is known the cold and dense air blowing down from the mountain slope during the night__________?

• A. Anabatic Wind
• B. Katabatic wind
• C. Lue Wind
• D. None of these

Explanation: A katabatic wind is cold, dense air that flows downhill under gravity, commonly from mountain slopes at night. Anabatic winds move uphill as heated air rises during the day.

192. The disease "Itai Itai "is caused by____________?

• A. Carbon
• B. Cadmium
• C. Manganese
• D. None of these

Explanation: Itai-itai disease is a severe form of cadmium poisoning, historically linked with contaminated rice and water in Japan. The name refers to the painful bone damage caused by the disease.

193. Most of the weather phenomena take place in which of the following layers of the atmosphere?

• A. Mesosphere
• B. Ionosphere
• C. Stratosphere
• D. Troposphere

Explanation: The troposphere is the lowest atmospheric layer and contains most of the air, water vapour, clouds, and weather processes. The stratosphere lies above it and is comparatively stable.

194. Granite is a____________?

• A. Metamorphic rock
• B. Igneous rock
• C. Sedimentry rock
• D. None of these

Explanation: Granite forms when molten magma cools and solidifies slowly beneath Earth’s surface, producing a coarse-grained intrusive igneous rock. It is not sedimentary or metamorphic rock.

195. Earth is divided into following three layers?

• A. Crust, Mountains, Oceans
• B. Crust, Mantle, Trenches
• C. Trenches, Mountains, Core
• D. Crust, Mantel, Core

Explanation: The broad internal divisions of Earth are the crust, mantle and core. Option d contains a spelling error, writing “Mantel” instead of “Mantle,” but it is clearly the intended answer.

196. How many layers does the earth have?

• A. 1
• B. 2
• C. 3
• D. 4

Explanation: Earth is commonly described in three major layers: crust, mantle and core. More detailed models subdivide these layers, but the standard elementary classification has three.

197. Silver fish is the name of__________?

• A. Insect
• B. Fish
• C. Bird
• D. Mammal

Explanation: A silverfish is a small, wingless insect with silvery scales and a fish-like movement. Despite its name, it is not a fish.

198. Rearing of honey bees for honey production is called?

• A. Sericulture
• B. Apiculture
• C. Viticulture
• D. Bees culture

Explanation: Apiculture is the rearing and management of honey bees for honey, beeswax and other products. Sericulture concerns silk production, while viticulture concerns grape cultivation.

199. Sericulture is the study of which discipline ?

• A. silk production
• B. milk Production
• C. honey production
• D. forest timber production

Explanation: Sericulture is the commercial rearing of silkworms and the production of silk. The terms apiculture and dairy farming refer to honey-bee and milk production respectively.

200. Earthquakes occur most frequently at __________?

• A. Plate boundaries
• B. Plate surface
• C. Ocean beds
• D. All of the above

Explanation: Earthquakes occur most often where tectonic plates meet because plate movement concentrates stress along these boundaries. Ocean beds and other plate surfaces can experience earthquakes, but they are not all equally active.