When glass is spun into fine fibers, the trapped air makes a thermal insulator. a. true b. false

TRUE

Explanation:

Glass spun into fine fibers is called fiberglass and is commonly used as an insulator.

catya that's not even a b or c

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.