Sure, let's go through each statement to understand the process of rock metamorphosis in detail.
1. If the rocks are buried deep, temperature and pressure will increase.
This statement is true. As rocks are buried deeper within the Earth's crust, they are subject to higher temperatures and pressures. This increase in temperature and pressure changes the original rock, referred to as the protolith, into a metamorphic rock.
2. Contact metamorphism creates non-foliated metamorphic rocks.
This statement is also correct. Contact metamorphism occurs when the protolith is near a body of magma, and the heat transfer from the magma causes the rock to metamorphose. Importantly, the changes during contact metamorphism usually result in non-foliated metamorphic rocks, as opposed to the foliated metamorphic rocks that are often produced through regional metamorphism.
3. Magma will bake the surrounding rocks due to the difference in temperature.
This statement is true. When a body of magma is intruded into the Earth's crust, it heats and "bakes" the surrounding rocks. This is again part of the process of contact metamorphism.
4. Deformed rocks with foliation/lineation are brought by pressure and the recrystallization of minerals.
This is again a correct statement. Under high-pressure conditions, the protolith can deform and recrystallize, creating a foliated metamorphic rock.
5. Pressure is the main factor of contact metamorphism.
However, this statement is false. In contact metamorphism, it is heat — more so than pressure — that plays the primary role in driving metamorphosis. This heat comes from the intrusion of magma into cooler surrounding rock.
6. Slate and gneiss are examples of foliated rocks.
This statement is also true. Slate and gneiss are examples of metamorphic rocks that have undergone pressure and deformation to the point where they exhibit foliated characteristics — that is, a layered or banded appearance.
In summary, rock metamorphism is a complex process, affected by a combination of heat, pressure, and the original composition of the protolith. As we've seen, the relative importance of these factors can vary, depending on the specific processes involved. Particularly, in contact metamorphism, heat — rather than pressure — is the primary driver of metamorphic change. Meanwhile, high-pressure conditions can produce distinctly foliated rocks such as slate and gneiss.