... identical This kind of rock is called rhyolite The most finely grained igneous rock is volcanic glass or obsidian, 26 (25 ) TOEFL Reading Comprehension which has no crystals Some researchers believe this ... of diversity would have to predict not only this difference between 20 TOEFL Reading Comprehension temperate and tropical zones, but also patterns within each region, and how these patterns vary ... for every farmer to own 28 The word “ponderous” in line 21 is closest in meaning to (A) advanced (B) heavy (C) complex 14 (D) rapid TOEFL Reading Comprehension Questions 29 -39 The Native American...