Jim, age 55, plays basketball with much younger adults and is concerned that his teammates might consider his age to be a detriment to their game outcome. His concern actually undermines his athletic performance. This best illustrates the impact of

Stereotype threat

Explanation:

Stereotype threat is the unpleasant situation in which a person seems himself or herself to be at the risk of keeping up to the stereotypes persisted by his/her social group.This treat can be based on cultural aspects, race, age,ethics, gender etc.

According to the question,Jim is displaying stereotype threat because he feels that his age can be an issue for football game results because other players are younger than him.Thus, he thinks he might face stereotype based on his age which is degrading his performance.

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