Explain why gases make better thermal insulators than solids or liquids.

Gases make better thermal insulators and is due to the more inter molecular distance, and the weak forces among particles of gases.

Explanation:

The speed of heat transfer by conduction is varies for different materials. If the materials is less dense they are better insulators and if the material is more dense its insulating property is very less.

An insulator is a material that is poor conductor of heat. In gases the inter molecular forces of attraction is weakest. The particles are very apart from each other.

Solids conduct heat better than liquids, which are in turn better conductors than gases ... Thus liquids are usually poor conductors of heat. In a gas, the particles are far apart, making energy transfer by collision very inefficient. Thus gases, like air, are very poor conductors of heat.