Thanks for the pic, Kris…you have captured both chemtrails and contrails in the same photograph, which now makes it possible to show others the difference. 
Here ya go…
Notice how, in contrails, the water crystals from compressed atmospheric moisture create a very small trail that quickly disappears once the sunlit ice melts back into water vapor and disapates. Also notice the chemical trails that stretch all the way across the sky, and are not disipating. They are lingering because they are not water vapor – they are other larger molecules of aerosolized solids that dont evaporate, but instead spread out in the atmospheric currents as they slowly drift toward earth. Just think of it this way: Long Trail = Chemical Spray; Short Trail = Ice Crystals.