How to Measure an Earthquake

Q. An earthquake is a sudden shaking or trembling of the earth lasting for a very short period of time. It is caused by a disturbance deep inside the earth’s crust.

1. True
2. False

Q. What is seismic focus or hypocentre?

Q.

The size of an earthquake is expressed in terms of magnitude on a scale called ___.

1. Earth Scale

2. Richter Scale

3. Righter Scale

4. Quake scale

Q. The intensity of an earthquake is expressed using the scale.

1. Metre
2. Richter
3. Tectonic

Q.

Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures $3$ on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?

Q.

If the Richter scale is measuring 4 or less than it, it's dangerous to stay at such place.

1. False

2. True

Q. What can be said about the earthquake that is measured as 5.5 to 6.0 on the Richter scale?

1. Rarely causes damage.
2. Slight damage to well-designed buildings.
3. Major damage to smaller buildings and houses.
4. Causes severe damage across hundreds of kilometres.

Q.

How does a seismograph work?

Q. A seismograph is a graph which records an earthquake.

1. False
2. True

Q. The intensity of an earthquake is expressed using the scale.

1. Metre
2. Richter
3. Tectonic

Q. The magnitude of an earthquake is measured using:

1. Richter scale
2. Vernier scale
3. Celsius scale
4. Kelvin scale

Q.

The news says that there was an earthquake of magnitude 7.5 on the Richter scale in Nepal, and there was an earthquake of magnitude 6 on the Richter scale in your hometown. Which of the following would be true?

1. The earthquake in Nepal is more severe

2. Both are equally severe

3. None of the above

4. The earthquake in your hometown was more severe

Q. What is measured on the Richter scale?

Q. Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage? [3 MARKS]

Q. Clearly differentiate between the following:
(a) earthquakes and tsunamis
(b) epicentre and focus

Q. To map Earth's interior, geologists use a network of seismometers to chart seismic waves that originate in the earth's crust and ricochet around its interior, most rapidly traveling through cold, dense regions and slower through hotter rocks.

1. Interior, most rapidly traveling through cold, dense regions and slowe
2. Interior, which travel mostrapidly through cold, dense regions, and more slowly
3. Interior, traveling most rapidly through cold, dense regions and more slowly
4. Interior and most rapidly travel through cold, dense regions, and slowe
5. Interior and that travel most rapidly through cold, dense regions and slower

Q.

___ is a graph which records an Earthquake.

Q. Seismic waves can be recorded using a .

1. pictograph
2. seismogram
3. seismograph

Q. how do you relate the energy realeased during the collosion of fault lines during earthquakes to theatomshere

Q.

The instrument which records waves on the surface of the earth produced by tremors is called?

1. Pictograph

2. Octograph

3. Seismograph

4. None of these

Q. Which one of the following is most prone to earthquakes?

1. Coastal plains
2. Old shields
3. Plateaus
4. Young folded mountains

Q.

What is the name of the scale which is used to quantify the size of an earthquake?

1. Vector

2. Meter scale

3. seismograph

4. Richter

Q. The magnitude of an earthquake is measured using:

1. Richter scale
2. Vernier scale
3. Celsius scale
4. Kelvin scale

Q. Identify the modern equipment which predict earthquakes.

1. Creep meter
2. Geiger counter
3. Strain meter
4. Pressure gauge
5. Thermometer
6. Tiltmeter
7. Tide gauge
8. Barometer

Q.

What is the name of the scale used to quantify the size of an earthquake?

1. Vector

2. Meter scale

3. Seismograph

4. Richter

Q. The area associated with the greatest frequency of earthquakes is ____________________.

1. Eastern coastal areas of Asia
2. Northern coastal areas of Europe
3. West coast of North and South America
4. Western coastal areas of Africa