During a follow-up trip, the geology team revisited one of their volcanic study sites to collect new samples near the base of an ancient lava dome. Nearby mapping showed several narrow igneous dikes that had intruded through older rock layers. Two samples collected only a few meters apart showed clear differences: Sample E contained large, interlocking crystals of feldspar and quartz and was very dense. Sample F displayed tiny, intergrown crystals with a few scattered gas cavities (vesicles) and a dull gray surface. The team noted that both rocks likely originated from the same magma source but cooled under different conditions. Choose the correct answer from each drop-down menu to complete the statements.