i need help. how to beat scandinavian defense?

hi everyone! i have been playing in chess.com for about a month now. but im still a terribel player. well many times i play e4. my question is how to win against somebody(i play as white) who plays after 1.e4, 2.d5, 3.exd5 , 4.Qxd5, 5.Nc3, 6.Qa5(avoid the knight on c3).

what do i suppose to do then? should i chase away or trap the black queen on a5? or just ignore the Qa5 and develop the other pieces instead?

i would like to appreciate your answers. thanks 

You'll typically find a Caro pawn structure against such openings.  Black wants to free his pieces with either ...c5 or ...e5 and white has many ways to parry these depending on the specific position.  You could parry a ...c5 break with pawn to c5, but the move has its plusses and minuses.  For one it cedes d5 for black's pieces, makes a target out of your d-pawn, which is backward on an open file, and enables black to open lines with ...b6.  Use your judgment to determine if the plusses (Ne5-Nc4-Nd6 being a realistic prospect without a real counter against it and preventing the liberating idea of favorably changing the pawn structure with ...c5 or even ...e5 if it shoos the Bd6 away from controlling e5 for example) outweigh the minuses. 

 Black will usually play ...c6 at some point in the Scandinavian to make room for his queen to retreat (in addition to the typical reasons such as solidifying d5)

Murder_King. Click on home. Click on opening explorer.  Click on scandinavian fever. That I hope will help you out. That's the best I can go. If you click play on the chessboard. It will take you through the whole game using the scandivian defense. That and youtube videos. I wish you the best of luck. tinman5150

At your blitz rating, I would not worry too much about openings. Your games are more likely to be decided by blunders. In fact, I only had to go back to your last game with the Scandinavian defence game to see this.

http://www.chess.com/livechess/game?id=952494732

In that particular game you did not play not play the opening correctly, however your position was fine at move 14. However, you then blundered a pawn, but then more importantly you blundered a rook shortly afterwards. You would be better off just working on tactics for the minute. As far your openings goes, just try and concentrate on general opening principles of controlling the centre and developing your pieces.