Points to Remember. 1  Marijuana refers to the dried leaves, flowers, stems, and seeds from the hemp plant, Cannabis sativa. 2  The plant contains the mind-altering chemical delta-9-tetrahydrocannabinol (THC) and other related compounds. 3  People use marijuana by smoking, eating, drinking, and inhaling it.
A cold front is symbolized on a weather map as a line with triangles. The triangles can be thought of as icicles. Cold fronts are often coloured blue. The presence of a cold front means that cold air is advancing and pushing underneath warmer air.
Figure 2 - Side View of a Typical Cold Front: Cold Fronts: Cold front- a front in which cold air is replacing warm air at the surface. Some of the characteristics of cold fronts include the following: The slope of a typical cold front is 1:100 (vertical to horizontal). Cold fronts tend to move faster than all other types of fronts.