📘 THE INTERNATIONAL SYSTEM OF UNITS (SI UNITS) The International System of Units (SI) is the standard way of measuring used all over the world in science and everyday life. It helps everyone measure things accurately and in the same way. 🔹 WHY SI UNITS ARE IMPORTANT ✔️ Used worldwide ✔️ Makes science easy and clear ✔️ Helps students, scientists, and engineers understand measurements 🔹 BASIC SI UNITS These are the main units used in science: 📏 Length – metre (m) Example: Length of a classroom