Which expression converts 100 inches per minute to feet per minute? 0 100 inches 1 minute 60 minutes 1 hour o 100 inches 1 minute 1 hour 60 minutes 100 inches 1 minute 1 foot 12 inches 100 inches 1 minute 12 inches 1 foot​

~dasgupta/mathbook/append17dec2k8.pdf

correct answer was 0.5

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.