Use this A2-B1 ESL science reading passage to learn why stars twinkle. It includes key vocabulary, reading comprehension questions, and answers for English learners.Reading LevelA2-B1Word Count183 wordsReading PassageOn a clear night, stars can look like tiny lights that blink. They may seem bright, then dim, then bright again. This small change is called twinkle.Stars do not really turn on and ..