They can change into coal
HEAT AND PRESSURE-
What happens to cookie dough when you put it in the oven? The heat of the oven produces changes in the ingredients that make them interact and combine. Without melting the dough, the heat changes it into a whole new product - a cookie.
A similar process happens to rocks beneath the earth's surface. Due to movements in the crust, rocks are frequently pulled under the surface of the earth, where temperatures increase dramatically the farther they descend. Between 100 and 200 kilometers (62 and 124 miles) below the earth's surface, temperatures are hot enough to melt most rocks. However, before the melting point is reached, a rock can undergo fundamental changes while in a solid state - morphing from one type to another without melting.
An additional factor that can transform rocks is the pressure caused by tons of other rocks pressing down on it from above; heat and pressure usually work together to alter the rocks under the earth's surface. This kind of change, which results from both rising temperature and pressure, is called metamorphism, and the resulting rock is a metamorphic rock.
Metamorphism
Yes. A rock is said to be metamorphosed when it undergoes a change due to heat and/or pressure.
Metamorphic rocks are formed from igneous, sedimentary and older metamorphic rocks that are introduced to extreme temperature and pressure. Because of the extreme temperature and pressure, rocks go through a significant chemical or physical change, turing them into metamorphic rocks.
by melting and cooling
Sedimentary rocks are formed by compacting and cementation and change over time into metamorphic rocks by heat and pressure
heat and pressure
by heat & pressure
No.
Heat and pressure
rocks can change form. There are three main types of rocks, sedimentary, Metamorphic and igneous. igneous. sedimentary rocks are rocks formed from sediment. Metamorphic rocks are rocks formed from heat and pressure. If other rocks are put under heat and pressure then they have a chance to change into metamorphic.
Heat along with pressure change rocks to metamorphic, increasing density as well.
heat and pressure.
Metamorphism
they change because under heat or pressure
heat and pressure
Metamorphic rocks have been changed by heat or pressure. This can be a change in size, shape, or arrangement of minerals.
Pressure, Heat, Chemically active fluids (water and CO2 in rocks), Time(obviously), and the parent rock composition.
Heat and Pressure