Turning Statements into Questions with か
In English, asking a question takes a little work. 'He is a teacher' becomes 'Is he a teacher?' The word order has to change. Japanese skips all of that. To turn any statement into a yes/no question, you add one tiny particle to the very end: か.
Just Add か
That's it. The word order stays the same. です stays at the end. The only thing that changes is that か at the very end signals to the listener, 'I'm asking, please answer.'
Same pattern, different topic. Once you feel the rhythm, you can ask a question about anything you can already describe.
In formal Japanese writing, sentences ending in か use a regular period 。 rather than a question mark. The か itself does the work, so the ? is considered redundant. In casual writing like text messages, you will often see ? used anyway, but in textbooks and newspapers, expect 。 even at the end of questions.