Which has the most gravity: a supernova, a white dwarf, or a black hole? What prefix turns the word ôtownö into a word meaning ôcenter of townö? If grapes cost $1.70 a pound, what will one and a half pounds of grapes cost? Plus onomatopoeia, fusion, equations, the planets, Roman numerals, abstract nouns, capital cities, the periodic table, Grab Bag, and: Which U.S. state is a group of islands? Brain Quest Grade 7 quizzes kids on the stuff they need to know when they need to know it, with 1,500 curriculum-based questions and answers reflecting the latest school standards.