Answer: (a) (i), (ii) & (iii)
An earthquake is a sudden shaking or trembling of the earth caused by the collision of the earth’s plates or the brushing of one plate against the other. Tsunamis, floods, and landslides are all possible outcomes.
An earthquake is defined as the shaking of the Earth’s surface caused by a sudden release of energy in the Earth’s crust, which causes seismic waves, also known as S waves. The type and intensity of an earthquake are determined by the seismic activity in the area.
- Earthquakes are caused due to sudden tectonic movements in the earth’s crust.
- When the tectonic plates slide over one another, there is a cause of orogeny which results in earthquakes and volcanoes.
- These disturbances cause vibrations that spread in all directions.
- As there is a relative motion of these plates, there is stress built up, which breaks by releasing the stored energy known as shock waves.