Chemistry Help! It's over gases! :)

According to kinetic molecular theory, gas molecules are in constant motion. This postulate helps explain why gases __________.

have a definite shape

are very compressible

have very low densities

assume the shape of their container

- Assume the shape of their container.

They don't have a definite shape, due to the fact that they are in constant motion. They can form to whatever shape, room, container, etc. that they are in. Gases are not easily compressible.