This engaging reading comprehension passage explores how the order of the planets affects their ability to support life, with a special focus on Mercury, Earth, Mars, and Neptune. Written especially for Grades 2–4 and English as an Additional Language (EAL) learners, the text explains complex science ideas using mostly simple, clear sentences without losing depth or curiosity. Students are invited to compare extremes—burning heat, freezing cold, and “just right” conditions—to understand w