No. Shelf is a noun, meaning a level or step, as in a book shelf or the continental shelf.
The past participle of the verb to shelve (shelved), can be an adjective meaning placed on shelves, or indefinitely postponed.
dangerous
Shelf.
The shelf in a hatch back is a partial shelf. A parcel is a package.
I'm putting the book on the shelf.
The collective noun is a shelf of books.
Shelf is not an adjective, it's a noun.
poisonous
Yes, an adverb can modify an adjective. For instance, you could say "I saw a very fast runner." Very, an adverb, modifies fast, an adjective. Another example is "The shelf is too high" where too (adverb) modifies high (adjective).
dangerous
Shelf.
The shelf in a hatch back is a partial shelf. A parcel is a package.
shelf
You can pick any two you want. From the Wikipedia entry: here is a list of the ice shelves, listed clockwise, starting in the West of East Antarctica. An ice sheet is included in the list: "Filchner Ice Shelf "Brunt Ice Shelf "Riiser-Larsen Ice Shelf "Quar Ice Shelf "Ekstrom Ice Shelf "Jelbart Ice Shelf "Fimbul Ice Shelf "Lazarev Ice Shelf "King Baudouin Ice Shelf "Hannan Ice Shelf "Zubchatyy Ice Shelf "Wyers Ice Shelf "Edward VIII Ice Shelf "Amery Ice Shelf "Publications Ice Shelf "West Ice Shelf "Shackleton Ice Shelf "Moscow University Ice Shelf "Voyeykov Ice Shelf "Cook Ice Shelf "Slava Ice Shelf "Gillett Ice Shelf "Nansen Ice Sheet "McMurdo Ice Shelf "Ross Ice Shelf "Swinburne Ice Shelf "Sulzberger Ice Shelf "Nickerson Ice Shelf "Getz Ice Shelf "Dotson Ice Shelf "Crosson Ice Shelf "Cosgrove Ice Shelf "Abbot Ice Shelf "Venable Ice Shelf "Stange Ice Shelf "Bach Ice Shelf "George VI Ice Shelf "Wilkins Ice Shelf "Wordie Ice Shelf "Jones Ice Shelf "Müller Ice Shelf "Prince Gustav Ice Shelf "Larsen Ice Shelf (Larsen A and B) "Ronne Ice Shelf"
No, the noun shelf is a common noun, a word for any shelf.
the continental shelf-edge or shelf-break
A floating shelf is held on several brackets that connect the shelf to the wall. The brackets are usually not visible to the observer, giving the shelf it's title.
The widest shelf is the Siberian shelf in the Arctic Ocean: it is 1500km.