Liquids and Solids (Chemistry)
States of matter 
This is a great overview of solids, liquids and gases. It is condensed and will give you most what you need to know on one page. There is also a neat table with the differences between solids,gases and liquids.
Aldehyde melting points
PDF with the melting points for common aldehydes.
Solid, Liquid, Gas, Plasma 
This article describes all the states of matter and includes some unconventional ones such as plasma and the Bose-Einstein Condensate.
Neat states of matter teaching aid 
Watch different types of molecules form a solid, liquid, or gas. Add or remove heat and watch the phase change. Change the temperature or volume of a container and see a pressure-temperature diagram respond in real time. Relate the interaction potential to the forces between molecules. ...
