General Geographical Features

Sea breeze occurs when winds blow from the sea toward coastal areas, typically during daytime when land heats up faster than water. This temperature difference creates lower pressure over land, drawing cool air from the sea.

The Indian Ocean experiences cyclones most frequently. Cyclone is the regional term for tropical cyclones in the Indian Ocean, while Hurricane (Atlantic), Typhoon (Northwest Pacific), and Tornadoes (land-based) occur less frequently in this region.

A sudden fall in barometric pressure indicates the approach of a storm or low-pressure system. Rapidly dropping pressure suggests stormy weather is imminent as low-pressure systems bring unstable atmospheric conditions.

Fog forms when moist air comes into contact with a cold surface near the ground, causing water vapor to condense on dust particles. This distinguishes fog from mist (lighter), dew (condensation on surfaces), or clouds (higher altitude).

Correct option is (4). 

The ozone layer in the stratosphere absorbs most of the Sun's ultraviolet (UV) radiation, protecting living organisms from harmful UV rays that can cause skin damage. It does not primarily block cosmic rays, ultrasonic waves, or infrared rays.

Soil conservation is the practice of preventing soil loss from erosion or reduced fertility. The primary goal is protecting soil against erosion caused by water, wind, and other factors while maintaining its productivity for future use.

 Correct option is (3).

The Mariana Trench is located in the western Pacific Ocean, near the Mariana Islands. It is the deepest known part of the world's oceans, with a maximum depth of approximately 11,034 meters at the Challenger Deep. The trench formed through the subduction of the Pacific Plate beneath the Mariana Plate.

The Caspian Sea is the world's largest lake by both area and volume. Despite its name, it is actually an inland body of water with no outflow to the ocean. It covers approximately 371,000 square kilometers and is bordered by five countries: Russia, Kazakhstan, Turkmenistan, Iran, and Azerbaijan.

The Himalayas were formed from the Tethys geosyncline, which was a vast sedimentary basin between the Indian and Eurasian plates. When these plates collided approximately 50 million years ago, the sediments in the Tethys Sea were folded and uplifted to create the magnificent Himalayan mountain range we see today.

A seismograph is the scientific instrument designed specifically to detect and record seismic waves produced by earthquakes. It consists of a sensor that detects ground motion and a recording system that produces a seismogram, showing the timing and intensity of the seismic waves.

A barometer is the meteorological instrument used to measure atmospheric pressure. It works by balancing the weight of mercury in a glass tube against the atmospheric pressure, or through aneroid mechanisms using a metal cell that expands and contracts with pressure changes.