SCA 3_13 Mar

How does conduction transfer heat in solids?

• By electromagnetic waves

• By current flow

• By molecular vibrations

• By molecules moving from one end to the other

How does heat transfer by convection occur in fluids?

• By molecular vibrations

• By movement of fluid

• By electromagnetic waves

• By movement of electrons

What is the primary mechanism of heat transfer through radiation?

• By electromagnetic waves

• By molecular vibrations

• By flow of fluids

• By electron diffusion

Which is an example of conduction in everyday life.

• Touching a hot metal spoon in a pot of soup.

• Boiling water in a kettle

• Using a microwave to heat food

• Sitting in the sun to warm up

Which of the examples describe(s) convection in action.

• A fan blowing air in a room.

• Ice cooling a glass of water.

• Boiling water in a pot on the stove.

• Heating a room with a radiator.

Which of the following is an application of conduction.

• t-shirts are white in colour

• ceiling in the school hall is very high

• air-conditioners are installed high on walls

• cooking pots are made of metal

Campers feel warm when seated around a campfire.

Which process transfers heat to them?

• conduction

• convection

• radiation

Heat from the Sun is transferred to earth by _______.

• conduction

• convection

• radiation

What materials are best for conducting heat?

• Copper, aluminum, and silver

• Wood, plastic, and rubber

• Air, water, and oil

• Glass, ceramic, and paper

Which statements describe convection currents?

• cold air rises

• hot air sinks

• cold air sinks

• hot air rises