The syllabus of class 10 cbse 2026-27 emphasizes conceptual clarity over rote learning. Key changes include a two-board exam system (February and May), a 50% weightage for competency-based questions and the continued use of NCERT textbooks as the primary resource ...
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Jet streams are found in the tropopause, which is the boundary between the troposphere and the stratosphere. They form here because this is where the greatest pressure and temperature differences between the cold polar air and warm tropical air exist. ...
The highest concentration of the ozone layer is found approximately 20 kilometers above the Earth’s surface. While ozone exists throughout the stratosphere (extending up to 50 km), its peak density—where it most effectively filters out the sun’s harmful ultraviolet rays—occurs ...
Within the context of historical meteorological data provided in many standard textbooks, 2010 is cited as one of the warmest years on record. This was due to a combination of long-term global warming trends and a strong El Niño event, ...
The world’s hot deserts, such as the Sahara and the Arabian Desert, are located in the Subtropical High-Pressure Belts (around 30° N/S). In these zones, air that rose at the equator sinks back to the surface. As it sinks, it ...