Question

if a skateboard was not a solid and did not have a definite shape, what might happen when you tried to ride it?

Answer 1

If it was not a solid then it would be either gas or liquid though either way you wouldn’t be able to ride it.

Answer 2

You can’t even get on it because it’s not a solid anymore also it depends on what your using to not make the skateboard not a solid anymore but besides that the other two properties are liquid and gas.