APSC Prelims and Mains Notes, APSC Test Series
. The trade winds, westerly and easterlies are the permanent winds. These blow constantly throughout the year in a particular direction and they are global in nature. These play an important role in, and in turn get influenced too, formation of Weather Cell. Headly Cell The air at the Inter Tropical Convergence Zone (ITCZ) rises … Read more
In Fissure volcanic eruptions, the Lava comes out to the surface through the cracks of the rock strata and hence the fissure eruptions are not much explosive. The fissure eruptions are smooth and the Lava spreads to a larger area, so they form landscapes such as plateaus. The major component of volcano are basalt. Basalt is … Read more
On 23 December 2005, the Government of India enacted the Disaster Management Act, which envisaged the creation of National Disaster Management Authority (NDMA), headed by the Prime Minister, and State Disaster Management Authorities (SDMAs) headed by respective Chief Ministers, to spearhead and implement a holistic and integrated approach to Disaster Management in India. NDMA Vision: … Read more
urban settlements are classified on various bases. However, classification based on size and function are most common. Let us discuss them one by one Classification based on Population Size According to population size, census of India classifies urban centres into six classes. Classwise urban settlements and their population Class Population Class I 1,00,000 and above … Read more
China China ranks first in the world in coal production. Nearly 38 per cent of world’s coal output is from China. All types of coal are found, including anthracite, bituminous coal and lignite. Although coal occurs in every province of China, but its greatest concentration is in Shanxi and Shaanxi (Shansi and Shensi). USA … Read more
Sand miningis a practice that is used to extract sand, from various environments, such as beaches, inland dunes and dredged from ocean beds, and river beds of deltaic regions. The mining is in operation in all the continents of the Globe. Environmental problems occur when the rate of extraction of sand, gravel and other materials … Read more
Earth’s core is the very hot, very dense center of our planet. The ball-shaped core lies beneath the cool, brittle crust and the mostly-solid mantle. The core is found about 2,900 kilometers (1,802 miles) below Earth’s surface, and has a radius of about 3,485 kilometers (2,165 miles). Planet Earth is older than the core. When … Read more
After independence, India witnessed green , blue and white revolutions in farm, fishery and dairy sector respectively. Green revolution: It was initiated to achieve food security in the country. It included three components : continued expansion of farming areas, double-cropping existing farmland, using seeds with improved genetics. The Green Revolution resulted in a record grain … Read more
Environmental Consequences One of the primary disadvantages of hydroelectric energy is its potential to destroy ecosystems. Plant and animal life in rivers and streams depends on certain environmental factors, from the speed at which the water flows, the level of water in the river bed, and the temperature of the water to the exact mix … Read more
A tsunami is a wave, or series of waves, caused by the vertical displacement of a column of water. This can be generated by earthquakes below the sea floor and violent volcanic eruptions above it, landslides above or below water or meteorite impacts into the sea. Effects of Tsunami: Affecting the mangroves, wetlands and basically … Read more