When we talk about how temperature affects density, it’s pretty interesting!

So, what is density?

Density is about how much stuff (or mass) fits into a space (or volume). When the temperature changes, it can change that space.

Let's break it down:

1. Heating a Substance:

   • When we heat something up, most things get bigger. This means that the same amount of mass takes up more space. So, the density goes down.
   • For example, when you heat water, it gets bigger and becomes lighter. That’s why warm water can float on cold water!

2. Cooling a Substance:

   • Now, when we cool something down, it usually gets smaller. This means the same amount of mass takes up less space, so the density goes up.
   • Think about when you put a can of soda in the fridge. The liquid inside gets denser as it cools.

3. Exceptions:

   • But there are some exceptions, like with water! Water is most dense at 4°C. When it gets colder than that, it starts to get bigger as it freezes. That’s why ice floats on water!

In simple terms, when you heat most things, they get less dense, and when you cool them down, they get denser. Just remember, there are a few exceptions, like water!