Josh Hughes - Solids, Liquids and gases answer.
This is Josh's answer to the question at the end of the solids, liquids and gases article:
you can walk through air easier than water because air is a gas so the particals move around and are not locked together. Its easyer to walk through water than a wall because a wall is a solid that means the particals are locked together and water they are still together but have room to move Excellent understanding, a concise and complete answer- well done Josh.