Class 7 Exam > Class 7 Questions > What can cause underwater landslides?a)Temper...
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What can cause underwater landslides?
- a)Temperature changes in the water
- b)Gravitational pull of the sun and moon
- c)Earthquakes or volcanic eruptions
- d)Movement of warm ocean currents
Correct answer is option 'C'. Can you explain this answer?
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What can cause underwater landslides?a)Temperature changes in the wate...
Causes of Underwater Landslides
Underwater landslides, also known as submarine landslides, occur due to various geological and environmental factors. Among the options provided, earthquakes or volcanic eruptions (option 'C') are the most significant triggers.
Earthquakes
- Underwater landslides are often triggered by the seismic activity associated with earthquakes.
- When tectonic plates shift, they create vibrations that can destabilize sediments on the ocean floor, leading to a sudden slide.
Volcanic Eruptions
- Volcanic eruptions can also contribute to underwater landslides.
- The force of an eruption can displace large volumes of water and sediment, causing the surrounding material to collapse.
Impact of Gravitational Pull
- While the gravitational pull of the sun and moon (option 'B') affects tides, it is not a direct cause of underwater landslides.
- Changes in sediment stability are usually unrelated to gravitational forces from celestial bodies.
Temperature Changes
- Temperature changes in the water (option 'A') can affect water density and currents but do not directly cause landslides.
- They may influence sediment transport but are not significant triggers for underwater landslides.
Movement of Warm Ocean Currents
- The movement of warm ocean currents (option 'D') can contribute to sediment redistribution but is less likely to cause immediate landslides compared to seismic activity.
- Warm currents may alter the stability of sediments over time but lack the sudden impact of earthquakes or volcanic activity.
In summary, earthquakes and volcanic eruptions play a crucial role in causing underwater landslides by destabilizing sediment on the ocean floor, making option 'C' the correct answer.
Underwater landslides, also known as submarine landslides, occur due to various geological and environmental factors. Among the options provided, earthquakes or volcanic eruptions (option 'C') are the most significant triggers.
Earthquakes
- Underwater landslides are often triggered by the seismic activity associated with earthquakes.
- When tectonic plates shift, they create vibrations that can destabilize sediments on the ocean floor, leading to a sudden slide.
Volcanic Eruptions
- Volcanic eruptions can also contribute to underwater landslides.
- The force of an eruption can displace large volumes of water and sediment, causing the surrounding material to collapse.
Impact of Gravitational Pull
- While the gravitational pull of the sun and moon (option 'B') affects tides, it is not a direct cause of underwater landslides.
- Changes in sediment stability are usually unrelated to gravitational forces from celestial bodies.
Temperature Changes
- Temperature changes in the water (option 'A') can affect water density and currents but do not directly cause landslides.
- They may influence sediment transport but are not significant triggers for underwater landslides.
Movement of Warm Ocean Currents
- The movement of warm ocean currents (option 'D') can contribute to sediment redistribution but is less likely to cause immediate landslides compared to seismic activity.
- Warm currents may alter the stability of sediments over time but lack the sudden impact of earthquakes or volcanic activity.
In summary, earthquakes and volcanic eruptions play a crucial role in causing underwater landslides by destabilizing sediment on the ocean floor, making option 'C' the correct answer.
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What can cause underwater landslides?a)Temperature changes in the wate...
Underwater landslides can be triggered by earthquakes or volcanic eruptions, which disturb the ocean floor and displace large amounts of sediment and rock. These landslides can generate tsunamis and significantly alter underwater topography.
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What can cause underwater landslides?a)Temperature changes in the waterb)Gravitational pull of the sun and moonc)Earthquakes or volcanic eruptionsd)Movement of warm ocean currentsCorrect answer is option 'C'. Can you explain this answer?
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