A challenge is a test both mentally or physically.

To sharpen an object on a grinder or grindstone is to grind it.

A written report of information for specialized needs is called a document. 

A serious and detailed examination of something is intensive.

A specialized doctor dealing with an unnatural cause of death. 

When a crisis presents itself you can either take charge or run for help.

When the group of students gather together in the auditorium is called an assembly.

To change something to bring into focus is to adjust it.

A single or double nostril on top of a whale is called a blowhole.

To move something forward like a card or paper is to flip it.