Translation:It is one o'clock.
It is understood that it is one o'clock when you want to tell the time 一時です when trying expres a time lapse or a period of time , the correct phrase is 一時間.(いちじかん) which tranlsates to "for one hour" , this works for weeks as well 一週間
If this one is pronounced "ichiiji desu", why when you say it in the negative do you say "hito kori"?
Seconding this, the correct pronunciation for 一時 should be ichiji.
However, hito toki is also a valid pronunciation of that kanji combination, but it means "a moment" or "a short time".
Yes, just like English, Japanese has synonyms.
I'm not 100% about this, but I feel like 一瞬 is shorter than ひととき, since another possible translation for 一瞬 is "an instant".
In English, when we say "Please wait a moment", that "moment" is longer than when we say "In that moment, my life flashed before my eyes". In the latter, we can replace "moment" with "instant", but not in the former. That's the difference between 一瞬 and ひととき I think.
Japanese doesn't actually have participles. I think you meant "particle", but no, it's not necessary here.
Each particle has a specific role to play in a sentence. The way this sentence is set up literally means "is (=です) 1 o'clock (=一時)". But what is 1 o'clock? That's what you need a particle to mark for you. Usually. But lucky for us, Japanese lets you leave out the "what" and use the context to figure it out. So, if you leave out the "what", you don't need to mark anything, therefore no particle required.
Yes, this could be AM or PM. However, you shouldn't translate it as "It is one PM," because that would be a different sentence in Japanese.
It is one AM.
It is one PM.
It is one.
Writing "it is 9" is wrongfully accepted as a correct answer. Perhaps it just assumes that the number is a typo, regardless of what it is.
Why is "it is one o'clock" right while "it's one o'clock" includes typos?
That's a good question; you should report it for the course developers (who don't necessarily read these comments) to fix.
All these o'clock sentences, DuoLingo keeps telling me o clock (with a space instead of an apostrophy) is a spelling error. o'clock developed in the old days as a quicker slur, so why can't o clock be considered a more convenient, still valid spelling? Everyone I know spells it with a space rather than an apostrophy in writing, and the end pronunciation is the same, so can we not be called out for spelling errors over it?
It really doesn't matter. O'clock is more standard and makes more sense, anyway (of the clock > o' clock > o'clock).