Which of the processes is exothermic? a) evaporation of alcohol
b) sublimation of iodine
c) solidification of volcanic lava
d) burning of paper

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this