If you found rocks that had been buried deep within the earth under high heat and pressure, they would most likelybe what type of rocks?

They would be metamorphic rocks because they form under high heat and pressure. Sedimentary rocks are formed under high pressure. Igneous rocks are formed under high heat.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.