What process changes sedimentary rock into metamorphic rock? A. heat and pressure B. weathering C. volcanic eruption
A. heat and pressure
The correct answer is A. heat and pressure.
To understand this, let's break down the different options and their effects on the rock formation:
A. Heat and pressure: The process of transforming sedimentary rock into metamorphic rock involves subjecting the existing rock to intense heat and pressure. This occurs deep within the Earth's crust, where high temperatures and immense pressure cause the minerals and textures of the original sedimentary rock to reorganize and recrystallize, altering its structure and forming new minerals.
B. Weathering: Weathering is a process whereby rocks are broken down into smaller pieces by natural elements such as wind, water, or temperature fluctuations. It does not directly change the composition or nature of the rocks from sedimentary to metamorphic.
C. Volcanic eruption: A volcanic eruption typically results in the creation of igneous rock, which forms from the cooling and solidification of molten lava. It does not directly change sedimentary rock into metamorphic rock.
In conclusion, the correct answer is A. heat and pressure, as this process allows for the transformation of sedimentary rock into metamorphic rock.