A. Character versus nature
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Rock often takes "thousands to millions of years" to change into one sort of rock.
The rock cycle is the process in which the three types of rocks—igneous, sedimentary, and metamorphic—are continuously changed. Increased temperature and/or pressure are necessary for the conversion of rocks to their metamorphic state, while sedimentary rocks and igneous rocks are formed through the intermediary stages of magma and sediments, respectively.
When sedimentary rocks are extensively buried under more sediments, higher pressure without a temperature rise is created. This happens in subduction zones and regions where two continental lithosphere plates meet to form mountain ranges. When rocks are elevated, worn, and eroded, the resulting detrital material is deposited in marine or terrestrial basins, producing sediments. The sediments may lithify to form a sedimentary rock if they are buried behind more sedimentary layers. When rocks melt, magma is created. When a mid-ocean ridge opens up and causes decompression melting in the asthenosphere underneath it, this melting can take place. It can also happen when a lithospheric plate sinks into the Earth's crust at a subduction zone. Upon the magma's formation, it becomes an igneous rock.
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Try to determine your audience and purpose or <span>write about how you became aware of something, gained a new way of seeing the world, a new insight. I think.
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In the sentence given in question, The word "<u>clouds</u>" is simple subject and the word "<u>obscured</u>" is simple predicate.
What is subject in grammar?
Technically, According to a tradition dating back to Aristotle (and connected with phrase structure grammars), the subject is one of a clause's two basic components, the other being the predicate, which expresses something about the subject. The subject is the main overt argument of the predicate, according to a tradition connected to dependency grammars and predicate logic. According to this view, all languages that support arguments have subjects, albeit it is impossible to define this universally across all languages. Even in languages like English, the semantic predicand and the subject are not always perfectly matched because a predicate could be based on an argument in another clause (see raising).
In this sentence which is given in the question, "Clouds of dust around the van obscured our vision.", "<u>obscured</u>" is the verb so it is working as a simple predicate. and the word "<u>clouds</u>" is the noun or pronoun so it is working as a simple subject.
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