Identify Central Idea and Text Structure Relationships

Answer: Incorrect. The answer is D because what makes the popcorn jump is connected to what makes the popping sound. A and B are incorrect because they are not relevant to the central idea. C is incorrect because it simply repeats that popcorn makes a pop-pop-pop sound but does not explain why, which is the information most connected to the central idea of this section. Go to question 2.

Answer: Incorrect. The answer is C, Sequence or Chronology. Paragraph 10 is about the initial research of the scientists studying what makes popcorn pop. The first clue that this paragraph is part of a sequence is in the second sentence when the author writes "At first." To show the sequential relationship between paragraphs 10 and 11, the author begins paragraph 11 with the phrase, "After studying these small movements." The structure of sequence between these two paragraphs makes the timeline of the researchers' work related to the popping sound of popcorn clear to the reader. Go to question 3.

Answer: Incorrect. The answer is B, Problem and Solution. In paragraph 10 the problem was figuring out what makes kernels jump. Their discovery, or solution, was seeing "a small 'leg' pop out from the broken hull."