Glass is an insulator of both energies. It does not conduct thermal energy because only it's surface warms up. It does not conduct electrical energy because its atoms do not have free electrons, which cause this process in metals.
Definitely an electrical insulator. Glass does not conduct electricity. It can be a thermal insulator, but not a great one. You windows on a cold day are pretty cold. Hot coffee in a mug will get the...
Glass is more often than not a thermal insulator. In very rare occurrences, when glass is mixed with metals to create a unique glass-like material, it will conduct heat.
Glass is an electrical insulator. It does not conduct electricity.
Many insulators made for power transmission lines or in the older days telephone or telegraph insulators, are made out of glass due...
Outer space is not material one. So heat cannot be transfered either by conduction or by convection mode. Only radiation is possible. Thereby space is not at all a condutor of heat energy.