moving the lips

Q: Is a person rewarded if he does zikr in his heart (without moving his tongue), or is it necessary for movement of the tongue in order to get rewarded for zikr?

Q:

1. Is it permissible to read zikr only with the mind without moving the lips.

2. My wife had a dream in pregnancy that she is looking at the 3 day old moon but the moon is shining like a full moon. What does it mean?