Answer:
What types of words are these: madam, civic, eye, level?
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
In the night a mountain, in the morning a meadow.
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
What tree that definitely grows does not have a shadow and does not grow fruit?
I can only be played on a windy day