Yes
No, it's not
It's a better insulator
i hope air is better than fibre glass
No, it's not, though it's better than you might think if you equate polystyrene with Styrofoam. Styrofoam is made of polystyrene, but it's the trapped air that makes it such a good insulator.
Styrofoam is a better insulator of heat than plastic. The plastic allows the heat in and out and the cold in and out. The Styrofoam helps keep the heat in.
Yes
No, it's not
Putting the cup in the freezer keeps ice from melting. Those cups will slow down the melting rate, but if you've got ice at room temperature it's gonna melt eventually. Having said that, ice will melt slowest in a styrofoam cup.
Wood is a better thermal insulator than glass, which is easily cooled.
It's a better insulator
i hope air is better than fibre glass
Glass has a higher conductivity than thin plastic but,it is still lower than metal so metal may be a better conductor
Because argon is a better insulator than air
No, it's not, though it's better than you might think if you equate polystyrene with Styrofoam. Styrofoam is made of polystyrene, but it's the trapped air that makes it such a good insulator.
Yes, styrofoam is full of air cells and air is a good thermal insulator. Styrofoam has poor solvent resistance, and poor hot performance.
No. Wood has more air in it than glass, and air is pretty much accepted to be one of the best insulators ever.