Cement
In short
A hydraulic binder used in construction to hold sand, gravel, and water together. It hardens through a chemical reaction to create strong structures.
In plain words
It is a fine powder that acts like glue for building materials. When you mix it with water, it turns into a paste that eventually becomes rock-hard.
A simple example
A builder mixes cement with sand and water to make mortar for laying bricks. They also mix it with large stones and gravel to create concrete for a driveway.
Why it matters
It is the foundation of modern civilisation and the most used material on Earth after water. Without it, we could not build skyscrapers, bridges, or roads.
Easy to mix up
People often confuse cement with concrete, but cement is just one ingredient used to make concrete.