Richter Scale

Q. An earthquake of magnitude 6 has ____ times more destructive energy than that of magnitude 4 on Richter scale.

1. 1000
2. 10
3. 100
4. 10000

Q. A Richter scale reading of 7.5 indicates that it is not a major earthquake and it is safe to stay at such a place.

1. True
2. False

Q. On Richter scale, an increase in the magnitude of 4 units means that the destructive amplitude of the earthquake increases by 8 times.

1. True
2. False

Q. Pick the most destructive earthquake based on its magnitude on the Richter scale.

1. 6
2. 5.5
3. 7.5
4. 4

Q.

On Richter scale, an increase in magnitude of 4 units mean that the destructive power of the earthquake increases by 4 times.

1. True

2. False

Q.

Based on the impact created, estimate the magnitude of earthquakes on Richter scale that occurred at Bhuj and Kashmir.

1. less than 4

2. less than 2

3. less than 6

4. Higher than 7

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]
[NCERT]
[Earthquake]

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

1. Metre
2. Richter
3. Tectonic