Good Riddles

Question: I am in everything and in nothing, what am I?

Question: I rise and fall no matter what, only at finals rest do I not budge, what am I?

Question: What can you feel but never touch, hear but never see?

Question: When i was 4 my sister was half my age. Now I am 100. How old is my sister now?

Question: There are ten children and ten cookies in a jar. Mrs. Suzie needs to give one cookie to each child. The children also want her to keep one cookie in the jar. how is this possible?