Warm air rises because of:
a) light
b) convection
c) conduction
d) radiation
A metal spoon is placed in a cup of hot water. The spoon get warm by:
a) conduction
b) convection current
c) radiation
d) convection
The reason why boiling water causes the circulatory motion in the pot is known as:
NTS CT 25/08/2019 (8:30)
a) convection
b) conduction
c) hot water
d) radiation
In a vacuum flask, the vacuum prevents the transfer of heat by:
a) conduction and convection
b) air
c) convection
d) radiation
The vacuum flask is……… thin glass or metal bottles.
a) five
b) four
c) three
d) two
When warm water rises in a lake and cold water sinks, what is
happening?
a) conduction
b) convection
c) radiation
d) mixing
