geomorphology & earth landforms section 8 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (c)

Magnitude and Intensity measure different characteristics of earthquakes. Magnitude measures the energy released at the source of the earthquake. Magnitude is determined from measurements on seismographs. Intensity measures the strength of shaking produced by the earthquake at a certain location.

Intensity is determined by its effects on people, human structures, and the natural environment. The Mercalli intensity scale is a seismic scale used for measuring the intensity of an earthquake.

It measures the effects of an earthquake and is distinct from the moment magnitude usually reported for an earthquake (sometimes described as the obsolete Richter magnitude), which is a measure of the energy released. The intensity of an earthquake is not totally determined by its magnitude.

Answer: (c)

The underground water of Karst topography carves our impressive channels and caves that are susceptible to collapse from the surface. When enough limestone is eroded from underground, a sinkhole (also called a doline) may develop. Sinkholes are depressions that form when a portion of the lithosphere below is eroded away.

Answer: (d)

The average temperature on Earth is about 61o F (16o C). But temperatures vary greatly around the world depending on the time of year, ocean and wind currents and weather conditions.

Summers tend to be warmer and winters colder. Also, temperatures tend to be higher near the equator and lower near the poles.

Answer: (d)

Answer: (a)

A bowl-shaped depression that is at the mouth of a volcano or geyser is called a volcanic crater. These craters are caused by the volcano’s activity. It is a vent.