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You have witnessed weather phenomena, such as winds, storms, rainfall, etc. Which atmospheric layer is mainly responsible for such phenomena and what is the primary reason for its occurrence?
(i) Responsible layer: The troposphere, extending from the ground up to roughly 12 kilometers altitude, contains almost all atmospheric water vapor and hosts all active weather phenomena. (ii) Primary cause: It is heated directly from the Earth's surface below, causing temperature to decrease with iRead more
(i) Responsible layer: The troposphere, extending from the ground up to roughly 12 kilometers altitude, contains almost all atmospheric water vapor and hosts all active weather phenomena. (ii) Primary cause: It is heated directly from the Earth’s surface below, causing temperature to decrease with increasing altitude; this thermal gradient triggers intense vertical convection currents, warm air ascension and cloud formation.
For more NCERT Solutions of Class 9 Science Exploration Chapter 13 Earth as a System: Energy, Matter and Life Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-13/
See lessHow are mountain and valley breezes formed? Suppose there are two mountains, one covered with grass and another covered with barren rocks; would the temperature of the two mountain breezes be different? If so, how?
(i) Breeze formation: Mountain slopes heat rapidly by day, causing warm air to rise and pulling cooler air upward as a valley breeze; at night, slopes radiate heat quickly, sending dense cold air downward as a mountain breeze. (ii) Temperature comparison: The barren rock mountain produces a significRead more
(i) Breeze formation: Mountain slopes heat rapidly by day, causing warm air to rise and pulling cooler air upward as a valley breeze; at night, slopes radiate heat quickly, sending dense cold air downward as a mountain breeze. (ii) Temperature comparison: The barren rock mountain produces a significantly colder nighttime mountain breeze because barren rocks lose stored heat much faster than vegetated slopes.
For more NCERT Solutions of Class 9 Science Exploration Chapter 13 Earth as a System: Energy, Matter and Life Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-13/
See lessDescribe how albedo affects the Earth’s surface temperature and its climate.
Albedo represents the proportion of incoming solar radiation reflected by a surface. Bright surfaces such as polar snow and ice possess high albedo (0.80 to 0.90), reflecting most sunlight back into space and cooling planetary poles. Conversely, dark soils, urban asphalt and deep ocean waters possesRead more
Albedo represents the proportion of incoming solar radiation reflected by a surface. Bright surfaces such as polar snow and ice possess high albedo (0.80 to 0.90), reflecting most sunlight back into space and cooling planetary poles. Conversely, dark soils, urban asphalt and deep ocean waters possess low albedo, absorbing significant radiant energy, elevating local temperatures and regulating climate dynamics.
For more NCERT Solutions of Class 9 Science Exploration Chapter 13 Earth as a System: Energy, Matter and Life Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-13/
See lessExplain how climate change affects the water cycle. Illustrate with examples.
(i) Altered precipitation patterns: A warmer atmosphere holds greater moisture, intensifying extreme rainfall events and floods in regions like the Indian monsoon belt while aggravating prolonged droughts elsewhere. (ii) Cryosphere and ocean disruptions: Accelerated melting of Himalayan glaciers incRead more
(i) Altered precipitation patterns: A warmer atmosphere holds greater moisture, intensifying extreme rainfall events and floods in regions like the Indian monsoon belt while aggravating prolonged droughts elsewhere. (ii) Cryosphere and ocean disruptions: Accelerated melting of Himalayan glaciers increases river runoff initially but causes long-term water shortages, while accelerated polar melting raises sea levels, threatening coastal cities.
For more NCERT Solutions of Class 9 Science Exploration Chapter 13 Earth as a System: Energy, Matter and Life Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-13/
See lessWhich of the following is primarily responsible for warming of the Earth? (i) Solar radiation is immediately absorbed by carbon dioxide, which then releases it as heat. (ii) The atmosphere’s tiny particles absorb incoming solar radiation, which directly heats the Earth. (iii) The Earth’s surface absorbs solar radiation, which is then re-radiated and trapped by greenhouse gases. (iv) The Earth’s environment is heated only by the solar radiation reflected by the clouds.
The correct option is (iii) The Earth's surface absorbs solar radiation, which is then re-radiated and trapped by greenhouse gases. Incoming solar energy is largely absorbed by land and oceans, raising surface temperatures. The warmed surface subsequently emits infrared radiation upward. GreenhouseRead more
The correct option is (iii) The Earth’s surface absorbs solar radiation, which is then re-radiated and trapped by greenhouse gases. Incoming solar energy is largely absorbed by land and oceans, raising surface temperatures. The warmed surface subsequently emits infrared radiation upward. Greenhouse gases like water vapor, carbon dioxide and methane absorb and re-emit this terrestrial radiation, keeping the planetary climate warm.
For more NCERT Solutions of Class 9 Science Exploration Chapter 13 Earth as a System: Energy, Matter and Life Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-13/
See less