THE CRA PERSPECTIVE • SCIENCE EXPLAINED How Is Water Different from Other Liquids? The extraordinary science behind an ordinary substance—and why life on Earth depends on its unusual properties. Water looks simple, but its molecular behaviour makes it one of the most extraordinary substances on Earth. Water is one of the most familiar liquids in our lives. We drink it, cook with it, wash with it and depend on it every day. Yet, from a scientific point of view, water behaves in ways that make it remarkably different from most other liquids. Think about a glass of water with ice cubes floating on top. Why does ice float instead of sinking? Why can a tiny insect stand on the surface of a pond? Why do oceans absorb enormous quantities of heat without experiencing equally dramatic temperature changes? Why does water take so much energy to boil, and why can it dissolve ordinary table salt when many other liquids canno...
THE CRA PERSPECTIVE Physical Strength Build a Stronger Body. Live a Stronger Life. Physical strength is more than muscles and appearance. It is the capacity to move, work, endure, recover and participate fully in the life you want to live. “A strong body is not merely something to display. It is something that allows you to experience life.” When people hear the words physical strength , they often imagine muscular bodies, heavy weights and athletic performance. But physical strength has a much broader meaning. It includes the ability to walk comfortably, climb stairs, carry everyday objects, maintain balance, recover from physical effort and remain capable of performing the activities that matter to us. Physical strength is therefore not simply about how m...