No, "jet stream" is not typically hyphenated when used as a compound noun.
The term "time travel" is typically not hyphenated when used as a noun or adjective. However, if it is being used as a verb, it may be hyphenated, such as in "time-traveling." The usage may vary depending on the style guide being followed, but in general, it is more common to see "time travel" as two separate words.
An open-spaced compound noun is a compound noun where the individual words are written as separate words, rather than hyphenated or combined into one. For example, "ice cream" is an open-spaced compound noun, as opposed to "snowstorm," which is a closed or hyphenated compound noun.
Yes, the term "free of charge" is hyphenated when used as a compound adjective before a noun. For example: "This service is free of charge."
µM stands for micromolar, which is a unit of concentration used in chemistry and biology. It represents one millionth of a mole per liter of solution.
No it doesn't need to be hyphenated.
No it doesn't need to be hyphenated.
The noun phrase 'four week vacation' does not need to be hyphenated.
yes for clarification
No it doesn't.
No it doesn't need to be hyphenated.
does write up need a hyphen
No the word "midday" is not hyphenated.
Yes it should be hyphenated.
Yes it should be hyphenated.
It is not hyphenated.
Yes, it should be hyphenated to desert-like.