Please determine what types of evidence the following may be, and if hearsay, please explain if there may be an exception to the hearsay rule:

A man holding a book of matches at the scene of a fire.

A person who is dead, a smoking gun on the floor, and a person standing over the deceased.

Seeing a car hitting a pedestrian.

A certified birth certificate.

An affidavit.

A receipt for prescription drugs.

"John just said that he killed Susan!"

A witness who saw that a child had a compound fracture of his leg.

An imprint of teeth marks on a person's arm

A diary.