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579211
Payal
Good neat and clean answer. Introduction is fine, use of flowchart is good. In 2nd point, mention that the convectional current makes the oceanic crust more plastic and less dense. The less dense material rises forming a mountain or elevated area of the seafloor and the constant eruptions of the crest cause the rupture of the oceanic crust. Next points are good
Use of diagram is nice too.
In evidences, mention volcanic activity along the mid-oceanic ridges, lesser sediments on ocean floor due to low age of oceanic crust, shallow earthquakes too. Points mentioned by you too are fine.
Conclusion is fine.
Keep practicing. 🙂
217112573522
how did u upload the pics?
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Akshada
Decent attempt.
Introduction is good. In the body, nice use of diagram. However, the process could be explained a bit more elaborately. You could mention that the convectional current makes the oceanic crust more plastic and less dense. The less dense material rises forming a mountain or elevated area of the seafloor and the constant eruptions of the crest cause the rupture of the oceanic crust and the bubbled up magma is cooled by seawater to form igneous rock. Again new lava wedges into the rupture pushing the crust on both sides.
Example mentioned is good.
Evidences given and conclusion are also fine.
Keep practicing. 🙂
4.5/10
pay_JIKD1ZumhuBMTn
Simranjeet
Introduction is good but you have used continental crust in place of oceanic crust in many places in the answer.
In next part, diagram is good. Explanation could be a bit more lucid, mention that convectional current makes the oceanic crust less dense which rises forming a mountain or elevated area of the seafloor, constant eruptions at the crest cause the rupture of the crust, igneous rocks formed by cooling effect of seawater, further entry of lava in the rupture pushing the crust further.
Evidences mentioned are fine. You could add points such as volcanic activity observed at mid-oceanic ridges, shallow foci of earthquakes, lesser sediments on ocean floor due to low age of oceanic crust.
Diagrams are good.
Conclusion is fine too.
Keep practicing. 🙂
JmQPOijgofaERD
Hello
Introduction is fine but you need to elaborate the process of seafloor spreading, diagram is nice but explanation also needs to be there.
Sea floor spreading is a tectonic activity, which occurs as a result of mantle convection, which
includes the slow, churning motion of Earth’s mantle. Convection currents carry heat from the
lower mantle and core towards the lithosphere. As tectonic plates slowly move away from each
other, heat from the mantle’s convection currents makes the oceanic crust more plastic and
less dense. The less-dense material rises, forming a mountain or elevated area of the seafloor. Eventually, the constant eruptions at the crest of oceanic ridges cause the rupture of the oceanic
crust and this bubbled-up magma is cooled by seawater to form igneous rock. Thus, the new
lava wedges into the rupture, pushing the oceanic crust on either side. This rock (basalt) becomes a new part of the Earth’s crust. The ocean floor thus spreads.
Evidences mentioned are okay, You could add points such as shallow foci of earthquakes at the ridges, lesser sediments on ocean floor due to low age of oceanic crust etc.
You can conclude by mentioning some examples.
Keep practicing. 🙂
2.5/10
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#0000572698
Naveen
Decent attempt. Introduction is good, but don’t open your answer with an abbreviation.
Process is also explained well. Diagram could be a bit bigger with better labelling. Some examples could be mentioned too after the explanation.
In evidence, you could add points such as volcanic activity observed at mid-oceanic ridges, shallow foci of earthquakes, lesser sediments on ocean floor due to low age of oceanic crust. Other points are good.
Conclusion is fine too.
Keep practicing. 🙂
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