Atmosphere & Weather — Set 3
Geography · वायुमंडल और मौसम · Questions 21–30 of 60
What is the center of a cyclone characterized by?
Correct Answer: A. Low Pressure
The center of a cyclone is characterized by low atmospheric pressure. Winds blow inwards towards this low-pressure center. In tropical cyclones, this calm center is called the 'Eye'.
Anticyclones are generally associated with which type of weather?
Correct Answer: A. Clear and stable
Anticyclones are high-pressure systems associated with clear skies and stable weather. Winds blow outwards from the center. They typically bring fair weather and a lack of precipitation.
Tropical Cyclones in Australia are locally known as?
Correct Answer: D. Willy-Willies
In Australia, tropical cyclones are known as Willy-Willies. They are the same phenomenon as Hurricanes in the Atlantic and Typhoons in the Pacific. They are intense circular storms that originate over warm tropical oceans.
Which scale is used to measure the intensity of a Tornado?
Correct Answer: C. Fujita Scale
The Fujita Scale (or Enhanced Fujita Scale) is used to rate tornado intensity. It estimates wind speeds based on damage caused. The scale ranges from F0 to F5.
A large body of air with uniform temperature and humidity is called?
Correct Answer: D. Air Mass
An Air Mass is a large volume of air defined by its temperature and water vapor content. It covers many thousands of square miles. Its properties are determined by the surface over which it forms.
The process of dissipation or dying out of a front is known as?
Correct Answer: A. Frontolysis
Frontolysis is the process where a weather front dissipates or dies out. Frontogenesis is the opposite process, where a front is created or regenerated. These terms are used in the study of mid-latitude cyclones.
The Koeppen climate classification system is primarily based on?
Correct Answer: D. Temperature and Precipitation
Koeppen's classification is based on average monthly temperature and precipitation. It identifies climate zones that correspond to vegetation distribution. It is one of the most widely used climate classification systems.
Which gas is the primary contributor to the enhanced greenhouse effect?
Correct Answer: C. Carbon Dioxide
Carbon Dioxide (CO2) is the primary greenhouse gas contributing to global warming. It traps heat radiating from the Earth's surface. Its concentration has increased significantly due to human activities.
Which phenomenon involves the warming of the ocean surface in the central and eastern tropical Pacific Ocean?
Correct Answer: D. El Nino
El Nino is the warming phase of the ENSO cycle in the Pacific Ocean. It can significantly affect global weather patterns. It often leads to reduced rainfall in regions like India and Australia.
The 'Eye' of a tropical cyclone is characterized by?
Correct Answer: D. Calm and clear skies
The Eye is a region of mostly calm weather at the center of strong tropical cyclones. It is characterized by light winds and clear skies. Surrounding the eye is the eyewall, where the most severe weather occurs.