Free Environment and Atmosphere MCQs with Answers

281. what kind of soil is treated with gypsum to make it suitable for cropping______?

• A. Alkaline
• B. Acidic
• C. Waterlogged
• D. Soil with excessive clay content

Explanation: Gypsum supplies calcium, which replaces exchangeable sodium in alkaline or sodic soil; the displaced sodium can then be leached away. This improves soil structure and makes the land more suitable for crops.

282. There are three types of plate boundaries i.e Divergent, Convergent and____________

• A. Normal
• B. Transform
• C. Complex
• D. Plain

Explanation: Divergent boundaries move apart, convergent boundaries move together, and transform boundaries slide horizontally past one another. This third type commonly produces earthquakes without necessarily creating or destroying crust.

283. The production of rubber tree is better adopted to areas where the climate is_________

• A. Warm and humid
• B. Warm and dry
• C. Cool and moist
• D. cool and dry

Explanation: Rubber trees grow best in warm, humid tropical climates with ample rainfall. Dry conditions restrict growth and reduce latex production.

284. Gulf streams are caused by__________.

• A. Cyclones
• B. Ocean Pressure
• C. Temperature
• D. Difference in water level

Explanation: The Gulf Stream is maintained largely by pressure gradients in the ocean, together with prevailing winds, Earth's rotation, and differences in water density. Among the listed choices, ocean pressure is the closest answer.

285. The areas around the North and South poles within the Polar circles is called _____________?

• A. The Torrid Zone
• B. The Frigid Zone
• C. The Temperature Zone
• D. The Hardiness Zone

Explanation: The regions within the Arctic and Antarctic Circles are called the Frigid Zones because they receive very oblique sunlight and remain cold for much of the year. The Torrid Zone lies around the equator.

286. The strength of wave action depends on all these EXCEPT:

• A. Currents in the sea
• B. Wind strength
• C. Depth of coastal water
• D. Height of waves

Explanation: Wave action is chiefly affected by wind strength, wave height, and the depth of coastal water. Sea currents may modify waves, but they are not normally listed as the primary determining factor in this basic classification.

287. Bore is caused by______?

• A. Rising tide while meeting river currents
• B. Friction from prevailing winds
• C. Spring tide and strong winds
• D. Unequal heating of oceans

Explanation: A tidal bore forms when a rapidly rising incoming tide moves up a narrow river or estuary against the river's outgoing current. The opposing flows create a moving wall or surge of water.

288. Which of these is not a Metamorphic rock?

• A. Quartzite
• B. Slate
• C. Gneiss
• D. Schist
• E. Diorite ✓

Explanation: Quartzite, slate, gneiss, and schist are metamorphic rocks formed by heat and pressure. Diorite is an igneous rock that crystallizes from slowly cooled magma.

289. Which of the statements to about the Troposphere is not true?

• A. It contains 85-90% of the atmosphere's mass
• B. It contains nearly all the water and oxygen of the atmosphere
• C. It is the zone which exhibits changes in condition of weather
• D. It is about 350 km thick

Explanation: The troposphere contains most atmospheric mass and nearly all weather-related water vapour, and weather occurs within it. It is only about 8 to 18 km thick, not 350 km.

290. A canyon is a large form of ________?

• A. Dry valley
• B. Gorge
• C. Pediment
• D. Badiand

Explanation: A canyon is a deep, steep-sided valley produced mainly by river erosion over long periods. It is therefore a large form of gorge.