1) Forward I am heavy, backwards I am not. What am I?

2) What can you put in a pocket to make it lighter?

3) What has a mouth but can't chew?

4) Poor people have it. Rich people need it. If you eat it you will die. What am I?

5) What can be heard and caught but never seen?

 

If you think you have a good riddle post it in the comments

 

What can run but never walks,
has a mouth but never talks,
has a head but never weeps,
has a bed but never sleeps?

 

Wow, a few of these were really puzzling

Couldn't figure out 4 and 5, Lulz