Teach Galaxies and Stars - Types of Galaxies: Spiral, Elliptical, and Irregular with this complete Grade 9 Science lesson featuring a science reading passage, comprehension questions, vocabulary activities, critical thinking tasks, evidence-based writing, presentation slides, answer keys, and an interactive online lesson.Students develop their understanding of Galaxies and Stars - Types of Galaxies: Spiral, Elliptical, and Irregular while strengthening science literacy, reading comprehension, an