I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

Take one out and scratch my head, I am now black but once was red. What am I?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?