Question

air is a good insulator because (check all that apply.)
check all that apply
a gas does not transfer heat very well because the molecules are far apart.
conduction takes place slowly in a gas.
gas molecules are not attached to each other.

Explanation:

Air is a gas. In gases, molecules are far apart. Heat transfer by conduction depends on molecular collisions. Since gas molecules are far apart (so they collide less frequently) and not attached to each other (so they don't form a continuous medium for easy heat - transfer like in solids), conduction (a major mode of heat transfer for insulators) is slow.

Answer:

All the options are correct.

• a gas does not transfer heat very well because the molecules are far apart.
• conduction takes place slowly in a gas.
• gas molecules are not attached to each other.