WorksheetsConduction and convection
Total questions: 15
Worksheet time: 11mins
The diagram shows a refrigerator. The cooling unit is placed at the top. The cooling unit cools the air near it. What happens to the density of the air as it cools, and how does it move?
The density of air increases. It moves down.
The density of air increases. It moves up.
The density of air decreases. It moves down.
The density of air increases. It moves up.
The diagram shows some rice being boiled in a pan. What is the main methods by which thermal energy is transferred (i) through the metal pan and
(ii) through the water?
(i) conduction (ii) conduction
(i) convection (ii) convection
(i) conduction (ii) convection
(i) convection (ii) conduction
Convection can take place in ____________.
solids only.
liquids only.
liguids and gases only.
solids, liquids and gases.
Which of the following is an application of convection?
The movement of heat through a metal pan to the food.
The use of ice box to keep drinks cool.
The sea breeze that blows from sea to land.
The use of wool blanket to keep the body warm.
What is the movement of particles, during convection, called ?
Conduction currents
Radiation currents
Insulation currents
Convection currents
Where do we see conduction in a pot of boiling water on the stove?
The water heats up by touching the hot, metal pot.
The steam from the hot water rises out of the pot.
The heat from the fire can be felt on all sides.
In heat transfer, heat always flows from the _______________ substance to the _______________ substance.
hotter to colder
colder to hotter
hotter to hotter
colder to colder
The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of ________.
convection
conduction
radiation
The type of heat transfer that creates currents in water is called ________.
conduction
convection
radiation
