What are scales?

A scale is like a special ruler that helps you see how big or small something is compared to other things.

Imagine you have a bag full of different toys, some are tiny cars, and others are giant stuffed animals. If you just look at them, it’s hard to tell which one is bigger or smaller. But if you use a scale, it’s like asking the toys, “How heavy are you?” The heavier toy gets a bigger number on the scale, so you can easily see which one is bigger.

Scales help us compare things in different ways:

• You can weigh your backpack and your friend's backpack to see who has more stuff.
• You can measure how much sugar goes into your cookie recipe to make sure it’s just right.
• Even a doctor uses a scale when they check if you’ve grown taller or heavier since last year.

A scale doesn’t do anything magical, it just tells you the number that shows how heavy something is, and then you can use that number to compare things.