Use this A2-B1 ESL science reading passage to learn what a glacier is. It includes key vocabulary, reading comprehension questions, and answers for English learners.Reading LevelA2-B1Word Count236 wordsReading PassageA glacier is a very large body of ice. It forms in places where more snow falls in winter than melts in summer.Over many years, snow piles up. The top layers press down on the older..