Lightening holes

Have you ever noticed tiny holes in things like airplane wings or car parts? These are called "lightening holes" but they don't make things lighter like a feather.

Instead, these holes help make heavy things lighter by removing some of the extra material that isn't needed. Think of it like a cookie cutter making a cookie - the cookie cutter removes just enough dough to make a perfectly shaped cookie.

The same thing happens with lightening holes. Engineers design them into heavy metal parts to remove just enough material without sacrificing strength or stability. This makes them lighter, which is important for things like airplanes because they need to fly high in the sky without being too heavy.

So, to sum it up, lightening holes are tiny holes in heavy things that help make them lighter by removing just enough material without compromising their strength or structure. Just like how a cookie cutter makes perfectly shaped cookies!