Short Riddles and Answers

Question: Hollow of water, tongue of wood, skin of stone, long I've stood. What am I?

Question: Tear one off and scratch my head. What once was red is black instead. What am I?

Question: I can be sun,
I can be sand,
and I can be bird.

What am i?

Question: Scientists are trying to figure out what is between Heaven and Earth.What is it?

Question: Paul is 20 years old in 1980, but only 15 years old in 1985.How is this possible?