3) Circle the right alternative.
i) The process of using a material of low thermal conductivity to prevent heat loss is
called
a) cooling
b) lagging
C absorption
d) contraction
ii) Metals are good conductors of heat because
(a) they are ductile
(b) they contain free protons
(C) they contain loose electrons (d) their atoms can be easily
displaced
iii) On a cool day, a metal feels cold to the touch because
a) metals contain less heat
b) the temperature of the metal is the same as that of the surroundings
c) the temperature of the metal is less than that of the surroundings
d) the metal conducts the heat away from the hand.
