The three rocks statements below are observations of the same rock sample:
- the rock has intergrown crystals from 2 to 3 millimeters in diameter
- the minerals in the rock are gray feldspar, green pyroxene, and black amphibole
-there are no visible gas pockets in the rock
this rock sample is most likely
a) sandstone b) granite c) gabbro d) phyllite

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.