Answer:
Metaphor - charcoal gown, her four years of school had reached the final chapter
Simile - placed the cap on her head like a crown
Onomatopoeia - cracked
Personification - the words leapt off the paper, time had flown by
Oxymoron - bittersweet
Alliteration - celebrating her success as a star student, she would also be saying so long; mentioned many of the marvelous memories they made
Explanation:
All of these terms refer to different figures of speech.
Metaphor and simile are both used to compare two things. A metaphor compares things that aren't too similar but have something in common (<em>charcoal gown</em> - a gown as dark as charcoal). This comparison is more subtle than a simile, which involves the use of words <em>like </em>and <em>as</em> (<em>place the cap on her head </em><em>like</em><em> a crown</em>).
Onomatopeia is a word that sounds just like the thing it is describing. In the given passage, this is the word<em> cracked.</em>
Personification is the attribution of human characteristics to something non-human (words leaping off the paper, time flying by).
Oxymoron refers to a combination of contradictory words (<em>bittersweet</em> is an example of one word oxymoron).
Alliteration is the repeated use of words that begin with the same sound (mentioned many of the marvelous memories they made).