Follow the clues and solve the terms you have learned.
Across:
1. The instrument which measures and records the magnitude of an earthquake in terms of the shock waves it produces.
4. The scale used to measure the intensity of an earthquake (7, 5)
5. An object carrying electric charge (7, 6)
6. The boundaries of the earth's plates where earthquakes are most likely to occur (4, 5)
Down:
1. The waves generated by an earthquake (7, 5)
2. The uppermost layer of the earth.
3. The charge acquired by an ebonite rod when rubbed with wool or flannel (8, 6)
1. The instrument which measures and records the magnitude of an earthquake in terms of the shock waves it produces.
4. The scale used to measure the intensity of an earthquake (7, 5)
5. An object carrying electric charge (7, 6)
6. The boundaries of the earth's plates where earthquakes are most likely to occur (4, 5)
Down:
1. The waves generated by an earthquake (7, 5)
2. The uppermost layer of the earth.
3. The charge acquired by an ebonite rod when rubbed with wool or flannel (8, 6)
Important Questions on Some Natural Phenomena
Fill in the blanks with the correct options from the box:
[Seismometer, Electric current, Negative, Boundaries, Continual, Charges, Charles F. Richter, Earthing, Fork lightning, Repel, attract]
When charges move, they constitute _____.
Earthquakes are most likely to occur at the _____ of the earth's plates.
[Seismometer, Boundaries, Continual, Charges, Earthing, Fork lightning]
Lightning is caused by the accumulation of _____ in the clouds.
[Electric current, Charges, Fork lightning]
Fill in the blank with the correct options given below:
[Seismometer, Electric current, Negative, Boundaries, Continual, Charges, Charles F. Richter, Earthing, Fork lightning, Repel, Attract]
_____ protects us from electrical shocks due to any leakage of electrical current.
A seismograph is also known as a _____.
[Electric current, Charles F. Richter, Earthing, Seismometer]
An ebonite rod acquires a _____ charge when rubbed with wool.
[Positive, negative, neutral]
Fill in the blanks with the correct options from the box:
[Seismometer, Electric current, Negative, Boundaries, Continual, Charges, Charles F. Richter, Earthing, Fork lightning, Repel, attract]
The plates of the earth are in _____ motion.
Fill in the blanks with the correct options from the box:
[Newton, Benjamin Franklin, Charles F. Richter]
_____ developed the Richter scale in 1935.
