Seismograph

Q.

(a) Name the three layers of earth. Draw a labelled diagram to show the structure of earth.

(b) What is a seismograph? Draw a labelled diagram of a seismograph.

Q.

Name the instrument used to measure and record an earthquake.

Q. The weak zones where earthquakes are more likely to occur are called as ___.

1. ritcher zone
2. green zone
3. seismic zones
4. red zone

Q.

What was the magnitude of Bhuj and Kashmir earthquakes on the Richter Scale?

Q.

On the Richter scale, an increase in the magnitude of say $4$ units means that the destructive power of the earthquake increases by $4$ times?

1. True
2. False

Q.

Really destructive earthquakes have magnitudes between 5 and 6 on Richter scale.

1. True

2. False

Q.

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

Q.

The earthquake occured at Bhuj and Kashmir created a lot of damage to life and property. Based on the impact created, can you guess the approximate magnitude of earthquakes on Richter scale?

1. less than 4

2. less than 2

3. less than 1

4. higher than 7

Q.

What is the use of earthing in an electrical appliance?

Q.

What are the three types of Seismic waves?

Q.

The earthquake occured at Bhuj and Kashmir created a lot of damage to life and property. Based on the impact created, can you guess the approximate magnitude of earthquakes on Richter scale?

1. less than 4

2. less than 2

3. less than 1

4. higher than 7

Q. Instrument used to measure earthquake is known as :

1. Typanic graph
2. Seismograph
3. Quake graph
4. Quake meter

Q.

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

1. True

2. False

Q. A seismograph is a scale used for measuring the magnitudes of earthquakes

1. True
2. False
3. Ambiguous
4. Data insufficient

Q. Seismic waves is recorded by an instrument called seismograph.

1. True
2. False

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. The earthquake in your hometown was more severe

3. Cannot determine the relation

4. They are equally severe

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. A Seismograph is a device that is used to measure the:

1. thunderstorm frequency
2. earthquake magnitude
3. lightning frequency
4. lightning intensity
   

Q. On which principle does a seismograph work?

1. Principle of inertia.
2. Principle of conservation of momentum.
3. Principle of gravitational force.
4. None of the above.

Q. The instrument which records waves on the surface of the earth produced by tremors is called:

1. Pictograph
2. Octograph
3. Seismograph
4. Barograph

Q. How many seismograph stations are used to locate the epicentre of an earthquake?

1. $4$
2. $2$
3. $3$
4. $9$

Q.

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

1. True

2. False

Q. Magnitude of earthquake is measured by

1. electroscope
2. Richter scale
3. seismograph
4. coulomb

Q. The first seismograph was invented in

1. Germany by Albert Einstein.
2. China by Zhang Heng.
3. Germany by Emmy Noether.
4. None of the above.

Q. What types of waves are seismic waves?

1. Non-mechanical waves
2. Elastic waves
3. Electromagnetic waves
4. Mechanical waves

Q.

The earthquake occured at Bhuj and Kashmir created a lot of damage to life and property. Based on the impact created, can you guess the approximate magnitude of earthquakes on Richter scale?

1. less than 1

2. higher than 7

3. less than 4

4. less than 2

Q. Seismic waves can be recorded using a .

1. pictograph
2. seismogram
3. seismograph

Q. Seismograph is a instrument used to:

1. Record lightning
2. Record strength of wind
3. Record temperature
4. Record vibrations of earthquakes

Q. A __________ records the waves generated by an earthquake, known as __________ waves.

Q.

Question 7

Consider the list of terms given below:
(i) Seismic zone
(ii) Fault zone
(iii) Mantle
(iv) Inner core
The boundaries of the earth's plate are known as
(a) (i) and (ii)
(b) (i) and (iii)
(c) (iii) and (iv)
(d) (ii), (iii) and (iv)