Why are ballistic missile defence, new WPI series and ‘brain-eating amoeba’ in the news?
Headlines tell you what happened, but UPSC asks why. The UPSC Civil Services Examination, whether at the Prelims or Mains stage, increasingly rewards conceptual clarity and the ability to apply core ideas. That is especially true in the most dynamic areas of the syllabus: Science, Economy and Environment. The UPSC Weekly Concepts Snapshot, every Wednesday, simplifies three important current themes from these subjects through an exam-oriented lens, focusing on concepts and clarity. Read the article, understand the concept, and then crack the quiz. Q1 of 5 • Science What distinguishes a ballistic missile from a cruise missile in terms of propulsion and flight path? Ballistic missiles use jet engines throughout their flight Ballistic missiles are powered briefly, then follow projectile motion along a parabolic arc Ballistic missiles always fly at low altitude, closer to the ground than cruise missiles Unlike cruise missiles — powered by jet engines throughout their flight — ballistic missiles are propelled only for a short initial phase. After that, gravity and physics alone govern their …









