Why does the moon look bigger....

Factual Questions
1

closer to the horizon, early in the evening?

2

Here you go:

http://www.straightdope.com/classics/a2_110.html

3

See here

It’s all to do with what size we believe the moon to be and then what size it appears to be when put in a different frame of reference. I’m no good at explaining so it’s best to read the article.