How to play these notes? by: Ido from www.piano-play-it.com
Hi Emma,
You are absolutely right; this sign is an Arpeggio.
It means that you should play the chord by "breaking" it. In other words you should play the notes quickly one after the other from bottom to top.
In your example I would play three notes in the left hand: D, F and D. By that, the right hand will be free to play the upper notes. The same thing will be in the second measure- the left hand will play three notes ( C G and C) and the right hand is free to play the upper notes.
Notice that the arpeggio is divided between the left and the right hand. The left hand takes the lowest note of the arpeggio with the thumb( D in the first measure, and C in the second one), and the right hand plays the rest of the notes( A D F in the first measure, and G C E G in the second one).
I hope that I helped you,
Don't hesitate to contact us if you have further questions, Ido from www.piano-play-it.com.