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.
The four types of fronts change the weather on Earth. A warm front  brings warm, humid air and a cold front brings dry, cool air. A  stationary front does not move and have â¦ winds parallel to the  front. An occluded front occurs when cold air overtakes warm air. 3 people found this useful.