How are sounds made?

Why can't we hear this alien scream in space?

And have you ever wondered, when you make a sound, like, ooooooooooooo, how does the sound actually get into your ears?

Watch what happens when the spaceship crashes on Earth.

That’s more like it.

So why is it than we can hear the alien scream now?

Well, sounds are made from vibrations.

We can't see vibrations, but if we did they would look a little like this.

Sounds are made when objects vibrate.

Soundwaves make the air around vibrate and the air vibrations enter your ear.

You hear them as sounds.

In space, there is nothing for the soundwaves to travel on.

That's why we couldn't hear the alien scream.