I watch television for several one hour periods randomly dispersed throughout the month. Each time I watch it, I also make a note of whether at least one murder was depicted during that period of time. This is best described as a(n) method of determining the overall depiction of homicide on television.

Time sample

Explanation:

Time sample method is the process in which the subject is observed for certain period of time interval for noting occurrence of process and then gathering information according to it. It is conducted for knowing about behavior of subject.

According to the question, time sample method is used for observing and noting the occurrence of murder scene everyday in a month at particular time intervals .

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals