the movement of molecules of a particular substance from regions of high concentration to regions of low concentration of that substance, i.e. down a CONCENTRATION GRADIENT. The rate of diffusion in gases is much greater than in liquids, due to differences in their molecular structure.
1990 Score Supplemental Emmitt Smith rookie card. This is Emmitt Smithâs best rookie card. You can find these football cards on Ebay in Gem MT 10 condition for about $300-$350. These cards are condition sensitive due to the colored border. A great card and a great investment.
It has been a big month for Wayne Gretzky rookie cards. First, the lone PSA 10 1979-80 O-Pee-Chee Wayne Gretzky rookie went for $465,000 during Goldin Auctionsâ 2016 Premium Live Auction at the National Sports Collectors Convention in