When As the rate of cooling of igneous rocks increases the size of the crystal that form?

As the rate of cooling of igneous rocks increases, the size of the crystals that form tends to decrease. This is because rapid cooling does not allow sufficient time for large crystals to grow, resulting in smaller, often finer-grained crystals. Conversely, slower cooling allows for more extended crystal growth, leading to larger crystals. Therefore, the cooling rate directly influences crystal size in igneous rocks.