In some countries, power usually changes between two main parties. Several other parties may exist, contest elections and win a few seats in the... View Article
The US uses first-past-the-post electoral system in which the highest-polling candidate wins the election. The president and vice president are... View Article
India is a parliamentary form of government that follows First Past the Post (FPTP) electoral system where the highest-polling candidate wins the... View Article
A party that secures at least six per cent of the total votes in Lok Sabha elections or Assembly elections in four States and wins at least... View Article
Only two major parties dominate US politics. They are the Democratic Party and the Republican Party. Yet other parties, such as the Reform,... View Article
Magma Chamber: Magma tends to be less dense than the layers of rock it forms in. As a result, it moves upward toward Earth's surface via any path... View Article
Mantle plumes may originate from the boundary between Earth's mantle and core, nearly 3000 km (about 1850 mi) beneath the surface. They are... View Article
Recently scientists have found evidence for a plume that is 350 km (about 220 mi) in diameter extending from the core-mantle boundary all the way... View Article
Ring of Fire is a long horseshoe-shaped seismically active belt of earthquake epicentres, volcanoes, and tectonic plate boundaries that fringes... View Article
A mantle plume is an area under the rocky outer layer of Earth, called the crust, where magma is hotter than the surrounding magma. The heat from... View Article
A mantle plume is an area under the rocky outer layer of Earth, called the crust, where magma is hotter than the surrounding magma. The heat from... View Article
If lava cools almost instantly, the rocks that form are glassy with no individual crystals. The basalt has a glassy appearance because of very... View Article
Basaltic magma is formed by the partial melting of mantle rocks. Basaltic lava is high in iron, magnesium, and calcium but low in potassium and... View Article
Basaltic lava can flow for tens of kilometres from an erupting vent. Basaltic lavas are relatively thin and are very fluid when erupted. Shield... View Article
Basaltic magma is formed by the partial melting of mantle rocks. Basaltic lava is high in iron, magnesium, and calcium but low in potassium and... View Article
No, volcanoes with basaltic lavas are not explosive. They are characterised by low explosivity. They become explosive if somehow water gets into... View Article
Volcanoes with basaltic lava are shield volcanoes. They are the largest of all the volcanoes on the earth. The Hawaiian volcanoes are the most... View Article
Basaltic lava is high in iron, magnesium, and calcium but low in potassium and sodium. It ranges in temperature from about 1000oC to 1200oC. They... View Article
