Answer :
Explanation:
Assertions and Reasons
SINCE 1997
1 Assertion(A): An opening or vent in the earth's crust through which the molten magma erupts is
called volcano.
Reason(R): Cooled down substance comes out through volcanos which eventually formed rocks.
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Explanation:
It seems like the question was cut off. If you're asking about the correctness of the assertion and reason provided:
Assertion (A): An opening or vent in the earth's crust through which molten magma erupts is called a volcano.
Reason (R): Cooled down substances come out through volcanoes which eventually form rocks.
Let's analyze these statements:
- **Assertion (A)** correctly defines what a volcano is: it is indeed an opening or vent in the Earth's crust through which molten magma, gases, and ash erupt.
- **Reason (R)** states that cooled down substances come out through volcanoes, which eventually form rocks. This is partly true. Volcanic eruptions do expel molten magma (lava), which upon cooling can solidify into various types of volcanic rocks like basalt or andesite. However, not all rocks are formed directly from volcanic eruptions; many other geological processes contribute to rock formation.
**Evaluation:**
- Assertion (A) is true and provides a correct definition of a volcano.
- Reason (R) is partially true but oversimplifies the formation of rocks. It correctly describes one way in which rocks (volcanic rocks) can form, but not all rocks are formed directly from volcanic activity.
**Conclusion:**
Assertion (A) is true, and Reason (R) is a partially correct explanation, but it does not fully support Assertion (A) because it oversimplifies the process of rock formation. Therefore, while both statements individually contain elements of truth, they do not form a correct cause-and-effect relationship as stated.
In terms of the format of Assertion and Reason statements typically used in exams or quizzes, the pairing of these two statements would be marked as "false."