Using End Punctuation

Use a period after a sentence that makes a statement.
I wrote a report about dinosaurs.
Use a period also after a sentence that makes a request or command.
Take a look at the part on T-rex.
Use a question mark after a sentence that asks a question.
Do you think T-rex was a predator or a scavenger?
Use an exclamation point after strong emotion.
I say predator!