These Science Riddles Will Make Your Brain Sweat

What swirls, loops, and circles on your fingertips, yet never moves?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nobody to throw it back?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Where on Earth's surface can a flag be blowing both north and south?

It is the son of the water but when the son returns to parent, it dies. What is it?

I am somewhere, where if I stand up straight, I might be considered sideways. Where am I standing?