Erica is working in the lab. she wants to remove the fine dust particles suspended in a sample of oil. which method is she most likely to use?
a reverse osmosis
b osmosis
c filtration
d dilution

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.