What is asoild or gas or liquid

A solid

- is hard

- cannot flow

- has a chosen shape

- has not much space between its particles

- cannot be compressed

A liquid

- can flow

- has a few space between its particles

- takes the shape of its container

- cannot be compressed

A gas

- can flow

- particles move freely

- expands to take place of the given space

- can be compressed

Not sure whether half your questions are a joke, or if your being serious ... They are states of matter