Raise is a transitive verb, which means that it always has an object (noun) after it.
Raise the blinds and let some light into the room. (The object of raise is blinds.)
Rise is the opposite of raise in that it is an intransitive verb. It stands alone without an object following it.
The sun rises today at 7:02 am.
The verbs are easy to distinguish in their present forms, but it can get confusing with the various tenses. Is it raised or rose? Have raised or have risen?
Here are the principle parts of raise and rise: