Watch: What is a question mark? Questions are sentences which ask something. When we write a question, we should put a question mark (?) at the end of the sentence. A question mark goes on the end of ...

So, I've heard a rumour that you can change liquids to gases, and back again. Right! Go on then. Let's see. Nice shower Square? Whoa! Cheeky. When water is heated up, it changes state from a liquid to ...