What Am I? Riddles With Answers

What can make a photo of a bright room darker without changing the room itself?

What puzzle has no pieces until someone explains the problem?

What map changes every day even when it stays on the same wall?

What coin can help you decide but cannot buy anything?

What wall can you scroll but never climb?

What kind of star is awarded when people judge something?

What paper can cut through silence without making a sound?

What hat helps a group think, even when nobody wears it?

What key can lock you out if you forget it?

What window can show yesterday but never lets in air?

What line can create a crowd without drawing anything?

What fire can cool tempers instead of heating them?

What empty cup can fill a whole room?

What pencil never writes, no matter how sharp it is?

I look like a tiny bird on your screen and follow your mouse movements, but I never flap my wings. What am I?

What crown has no king, no queen, and no jewels?

What home can fit on a key but has no rooms?

What cake tells you how old someone is?

What forest has no trees but can still be full of branches?

What shoe never walks, even when it has a sole?

What sound can you see but not hear?

What bag gets smaller every time you use it?

What moon can you eat before it becomes full?

What flag never flies but can still warn you?