sentences: particles in a liquid flows past each other & particles in a liquid are close to each other ->  particles in a liquid are close and can flow past each other  particles in a liquid are close and can flow past each other & the particles in the substance are close and able to flow past each other ->  the substance could be in liquid phase  the substance has a variable shape & matter in the liquid phase has variable shape ->  the substance could be in liquid phase or gas phase  the substance could be in liquid phase & the substance could be in liquid phase or gas phase -> the substance can only be in liquid phase