8586.Which one of the following is correctly matched ?
Troposphere - lowest layer of the atmosphere
Stratosphere - third layer of the atmosphere
Mesosphere - 30 km above the earth surface
Thermosphere - 50 km above the earth surface.
8600.Which one of the following is a major source of irrigation in Tamil Nadu in general?
Canał
Rivers
Tanks
Well
8626.Which of the following is called the Ganga of South India?
The Penna
The Kaveri
The Tamiraparani
The Palar
8628.Richter scale, a logarithmic scale to measure earthquake was devised by
Mercali Richter
Charles Richter
Edmund Richter
James Richter.
8668.Seismic waves are recorded with the help of an instrument known as
Earthquake meter
Barometer
Hypsometer
Seismograph
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