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.
1989 Score Barry Sanders Rookie. Score released one of the greatest football card sets of all-time in 1989. These cards were not easy to find and loaded with future Hall of Famers like Deion Sanders, Troy Aikman, and Michael Irvin. Most collectors believe that these are the best Barry Sanders rookie cards to buy. These cards are scarce and condition sensitive, which normally makes Gem MT 10 versions very hard to find. These Barry Sanders rookie cards sell for $15-$20 ungraded while Gem MT 10 versions sell for $175-$200.