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प्रश्न
Distinguish between primary waves and secondary waves.
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उत्तर
| S. No. | Primary waves | Secondary waves |
| (i) | These waves are the fastest of all the earthquake waves and the first to reach the epicentre. | Secondary waves travel less faster than the primary waves. |
| (ii) | These waves pass through solids, liquids and gases. | These waves travel only through solids. |
| (iii) | The average velocity of these waves is 5.3 k.m/sec to 10.6 k.m/second. | The average velocity of these waves is 1 k.m/sec to 8 k.m/second. |
संबंधित प्रश्न
Match the following
| 1. Endogenetic process | Seismograph |
| 2. Mantle | Subduction Zone |
| 3. Convergent boundaries | Volcanic |
| 4. Earthquake | Pacific Ocean |
| 5. Composite volcano | SIMA |
Define plate tectonics.
Write a note on the internal and external processes of Earth.
Explain the effects of Volcanoes.
The movement of tectonic plates is due to ______ energy from the mantle.
The collision with the Eurasian Plate along the boundary between India and Nepal formed ______ Plateau.
Match the following:
| (a) | Convergent Boundary | (i) | Away from each other |
| (b) | Divergent Boundary | (ii) | Tectonic Plates |
| (c) | Transform Boundary | (iii) | Towards each other |
| (d) | Huge slabs of rocks | (iv) | Folding |
| (e) | Lateral compressional forces | (v) | Horizontally past each other |
Match the following:
| (a) | Focus | (i) | L-Waves |
| (b) | Surface Waves | (ii) | S-Waves |
| (c) | Seismometer | (iii) | P-Waves |
| (d) | Secondary Waves | (iv) | Hypocenter |
| (e) | Primary Waves | (v) | Instrument |
Consider the given statement:
Statement I: Volcanoes can also be classified based on the periodicity of eruptions, as Active volcano, Dormant volcano, and Extinct volcano.
Statement II: A lava dome is roughly a circular mound formed due to the slow ejection of viscous lava from a volcano.
Which of the following statements(s) is/are true?
Explain the major components of a volcano.
