What Am I Riddles

Question: What sport starts with a T, has four letters, and is played around the world?

Question: 100 feet in the air, yet its back is on the ground.

What is it?

Question: What is bought by the yard by is worn by the foot?

Question: Cold and dark, I'm the same as my neighbor. Flatter than a pancake, faster than a panther. Lighter than a feather I still prevail, Yet a million mean trying to lift me would fail. Expanding and shrinking throughout the day, When heat is highest, underneath I lay. I leave in the darkness of the night, And don't come back if there's rain in sight. What am I?

Question: what comes in hard comes out soft and you blow ???????????????????????????????????????/