Its particles gain energy and move faster. (See Kinetic Theory.) Eventually, they can change state (or burn, in some cases.
When the material gets closer to the core it gets hotter and more dense.
It gets hotter
It gets hotter
When the density of a fluid gets hotter, it usually decreases. This is because as the fluid gets hotter, its molecules gain energy and move farther apart, causing the fluid to expand. This expansion leads to a decrease in density.
It gets hotter
It blows up BOOM!It blows up BOOM!
umm the greenhouse gets hotter
As you go deeper into the Earth, both temperature and density increase. The increase in temperature is due to the Earth's molten core and radioactive decay in the mantle. Density increases because of the weight of the overlying rock pushing down on the material below.
it gets stretched
Convection currents. It's when hotter material floats to the top, and the cooler and denser material goes and gets hot again.
it gets hotter and the presure get harder
It escapes by heating the air round the radiator element.