Jenna, a college sophomore, wants to master effective time-management techniques for studying. according to experts, which technique would be most effective? a. studying for 50 minutes, then breaking for 10 minutes b. highlighting passages in a book, rather than writing notes in the margin c. rotating classroom note-taking responsibilities with fellow students d. allowing at least four nights to study for any major exam e. reading assigned materials after the lecture so unimportant materials can be skipped

d. allowing at least four nights to study for any major exam

Explanation:

Experts suggest that one needs enough time before they go for a major exam in which they can study and be able to retain information which will avoid the panic that may be brought by amount of work that need to be studied in a short period of time if someone has waited until the last minutes before they study.

One needs time to break the material into pieces as they study in order to be able to grasp the information and digest it and that requires time and it will be difficult if they do it for a lot of information at once.

1. senate

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3.education

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