Metre–kilogram–second system of units

Hey kiddo! Have you ever heard of something called the metric system? It's a way we measure things like length, weight, and time in a really organized and easy way. The metre-kilogram-second (or MKS) system is a type of metric system that some scientists and engineers use.

So, let's start with length. Have you ever measured how tall you are? We use metres to measure length in the MKS system. A metre is a unit that helps us understand how long something is. We use a special stick called a ruler to measure in metres.

Next up is weight. Have you ever lifted something heavy like a backpack full of books? We use kilograms to measure weight in the MKS system. A kilogram is a unit that helps us understand how heavy something is. We use a special tool called a scale to measure in kilograms.

Lastly, we have time. Have you ever played a game and counted how many seconds it took to finish? We use seconds to measure time in the MKS system. A second is a unit that helps us understand how much time has passed.

So, the MKS system just combines these three things - length (metres), weight (kilograms), and time (seconds) - to help us measure all sorts of things in a really consistent and easy way. Scientists and engineers like to use the MKS system because it helps them communicate with each other and understand things better. Pretty cool, huh?