Tag: geography

Coastal erosion is confined to southwest monsoon season when the waves are rough. Seawalls and groynes are the major management strategies adopted for coastal protection along Kerala coast. As per Shoreline Change Assessment data, about 63 percent of the coastline of Kerala is eroding.

Answer is A.

The intensity of earthquake is measure on the richter scale.
The Richter magnitude scale was developed in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of earthquakes. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. Adjustments are included in the magnitude formula to compensate for the variation in the distance between the various seismographs and the epicenter of the earthquakes. On the Richter Scale, magnitude is expressed in whole numbers and decimal fractions. For example, a magnitude of 5.3 might be computed for a moderate earthquake, and a strong earthquake might be rated as magnitude 6.3. Because of the logarithmic basis of the scale, each whole number increase in magnitude represents a tenfold increase in measured amplitude; as an estimate of energy, each whole number step in the magnitude scale corresponds to the release of about 31 times more energy than the amount associated with the preceding whole number value.

The Richter magnitude scale was developed in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of earthquakes. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. Adjustments are included for the variation in the distance between the various seismographs and the epicenter of the earthquakes. On the Richter scale, magnitude is expressed in whole numbers and decimal fractions.

Earthquake forecasting refers to the probabilistic assessment of hazards, whereas prediction implies specifying a precise time, location, and magnitude, which is currently not scientifically possible.

• Seismology is the study of earthquakes which involves the prediction of earthquakes, hence option A is correct.
• Microbiology is the study of microorganisms and bacteriology is the study of bacteria, thus both are incorrect.

The tremors produce wave on the surface of the earth. These are called seismic waves. The waves are recorded by an instrument called the seismograph.

• Tsunamis are the catastrophic harbour waves caused by the displacement of a large amount of water at the seafloor.
• This displacement is often triggered by an earthquake at the seafloor thus option B is correct.
• Landslides are unrelated hence incorrect while Tsunamis may lead to flooding at the coastal zones. However, to chose one option the tsunami is the most direct answer to this question.

An oil spill refers to the release of liquid petroleum hydrocarbons into the environment, typically marine ecosystems.

There three heat zone on the earth.

Hunting and fishing is the main occupation of Eskimos. They hunt caribou, musk ox and other animals. Hunters do not apply the same techniques they use in many parts of the world due to lack of trees. Over hunting seriously endangers some species in the far north, especially musk oxen. Some natives are dependent on fishing as their occupation.