Which is needed to turn an igneous rock or sedimentary rock into a metamorphic rock?(1 point)
erosion and deposition
freezing and cementation
melting and cooling
heat and pressure
heat and pressure
Which statement is correct about uplifting and burial in the rock cycle?(1 point)
Uplifting exposes rocks to erosion, while burial exposes rocks to heat and pressure.
Uplifting exposes rocks to cooling, while burial exposes rocks to cementation.
Uplifting exposes rocks to heat and pressure, while burial exposes rocks to erosion.
Uplifting exposes rocks to cementation, while burial exposes rocks to cooling.
Uplifting exposes rocks to erosion, while burial exposes rocks to heat and pressure.
Heat and pressure are needed to turn an igneous rock or sedimentary rock into a metamorphic rock.
The correct answer is heat and pressure. To understand why, let's break down the options one by one:
1) Erosion and deposition: Erosion refers to the process of wearing away rocks or soil through natural forces like wind or water. Deposition, on the other hand, involves the settling down of eroded materials. While erosion and deposition can shape and transport rocks, they do not directly contribute to the formation of metamorphic rocks.
2) Freezing and cementation: This process is related to the formation of sedimentary rocks, not metamorphic rocks. Freezing and cementation occur when sediments are compacted and then bound together by minerals dissolved in groundwater.
3) Melting and cooling: This process is involved in the formation of igneous rocks, where molten magma or lava cools and solidifies. It does not represent the transformation of an existing rock into a metamorphic one.
4) Heat and pressure: Metamorphic rocks form when existing rocks undergo intense heat and pressure deep within the Earth's crust. These conditions cause the minerals and structures within the rock to change, resulting in the formation of a new rock with different physical and chemical properties. Examples of metamorphic rocks include gneiss, slate, and marble.
So, the correct answer is heat and pressure.