Lava will cool quickly compared to underground magma.
The decompression of air is an endothermic process. That means it absorbs heat. Air in a tire is under 35 to 40 psi of pressure. This pressure conpresses the gas inside the tire, so to speak. When you release the air, it rapidly expands and expanding gas cools the same as compressing gas warms up.+++Decompression is Exo-thermic! The pressure compresses the gas - err, well, yes. Compressing air means raising its pressure by reducing its volume; and if done rapidly also raises its temperature. The last bit is right: sudden expansion cools it.
crystal
as air cools, the space it occupies becomes less. this result in an increas density
It depends on what you mean. Are there quartz crystals on earth that are growing today? Yes. Is that quartz crystal in your rock collection still growing? No. Quartz crystals often form when water with super concentrated silica in it comes into contact with a surface (such as a very small crystal) onto which the silica can precipitate. Crystals also form when magma/lava cools and the different elements in the mixture differentiate into various minerals.
Not enough information. Some crystals will break if they cool rapidly, some crystals will not form correctly if the solution cools too quickly.
cools slowly.
When a magma cools/solidifies, crystals are formed. The quicker the magma cools, the tinier the crystals. A granite for example, which is formed through slow cooling in the Earth's crust, consists out of big crystals. Contrary, magma erupting at the surface (which is then called lava) cools rapidly and consists out of tiny crystals. In extreme cases, the lava cools so rapidly that the resulting rock appears glassy. Hope this helps!
Due to lack of humidity and cloud cover, the desert cools rapidly after sunset.
crystal
Fine crystal grain.
they depend on how fast it cools down
As a general rule extrusive igneous rock crystals are very small, often microscopic, as the rock cools very rapidly. Conversely intrusive magma often cools so slowly that sizeable crystals can develop.
if lava cools slowly, it will have a lot of crystals. When it cools fast, there will be little to no crystals what s ever.
"Larger than if it cools quickly" is about all that's definitively possible to say.
The rock cools so rapidly from magma that crystals barely have time to form.
coarse texture