1. What conditions are required for violent volcanic eruptions in the continenta
ID: 233554 • Letter: 1
Question
1. What conditions are required for violent volcanic eruptions in the continental margin? What causes these eruptions? What determines how violent they become?
2. For the ocean as a whole, what is the most abundant gas dissolved in seawater? Explain the role of this gas in photosynthesis and cellular respiration.
3.What is the Law of the Minimum and how might the Law of the Minimum be an important consideration in the event of a major environmental change in the ocean? Provide at least one example.
Please provide me atleast 2/3 of a A4 page for each question, thank you so much!
These are 3 in 30 question essay that I have to do for the final and they are the last 3 questions, but also the hardest =.=
Explanation / Answer
1..
For volcanic eruption in continental margin, first condition is the presence of source.
The volcanoes are formed in continental plate margin. The hot magma is their source.
The second factor is buoyancy of the magma. When rocks melt inside Earth’s crust, its mass remains the same but volume increases considerably. This magma than rises upward towards the surface of plates due to its buoyancy. The third factor is the pressure produced by the the gases in the magma. Molten lava produces gases such as carbon dioxide and sulphur dioxide. As the magma rises to the surface, the gas pressure increases which causes volcanic eruption.
The factor whether the magma is alkaline or acidic determines how is going to erupt. On one hand alkaline magma results in gentle eruption and on the other hand acidic magma results in violent eruption.
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