≈

The symbol ≈ means "approximately equal to". It's like when you and your friend are standing side by side, and even though you're not exactly the same height, you're still about the same height. So you're "approximately equal to" each other.

In math, we use this symbol to show that two things are almost equal, but not exactly equal. For example, if you're trying to measure the length of a pencil with a ruler, and you get 7.8 centimeters, you might write that as "7.8 ≈ 8". This tells us that the length of the pencil is really close to 8 centimeters, but not exactly 8 centimeters.

So basically, when you see the ≈ symbol in math or science, it means "almost equal to".