Street art

1. a very strong metal made from iron, used for making knives, machines, etc
3. a thought or belief about something or someone
6. to separate a place into two areas
8. a line on the surface of something that is damaged
9. someone who does work without being paid, especially work that involves helping people
11. to show objects such as paintings to the public
12. an opinion that something or someone is good or right
13. a flat structure made of long, thin pieces of metal crossing each other over a hole in the ground or a window

2. to change something completely, usually to improve it
4. something that exists or happens, usually something unusual
5. If the police arrest someone, they take them away to ask them about a crime that they might have committed.
7. a piece of clothing with buttons at the front and no sleeves, that you wear over a shirt
10. not allowed by law