Minecraft wiki entry for Experience, associated text: Experience orbs fade between green and yellow colors and float or glide toward the player up to a distance of 7.25 blocks (calculated from the center of player's feet and the center of the experience orb), speeding up as they get nearer to the player. Experience orbs pulled toward a player are slowed by cobwebs. Experience orbs can also be pulled around or away from the player by running water currents.