Grade 5 Physics Quiz: Heat Conduction, Convection, and Radiation

What is heat conduction in solids?

• Transfer of heat through chemical reactions

• Transfer of heat through direct contact between particles

• Transfer of heat through electromagnetic waves

• Transfer of heat through air currents

How does heat conduction occur in metals?

• Through the emission of light particles

• Via the transfer of potential energy

• By the movement of sound waves

• Through the transfer of kinetic energy between neighboring atoms and electrons.

Explain convection in liquids.

• The warmer part of the liquid rises and the cooler part sinks, creating a circular motion.

• Convection in liquids occurs when the liquid remains still and does not move.

• Convection in liquids is caused by the solid particles moving in a circular motion.

• The cooler part of the liquid rises and the warmer part sinks, creating a circular motion.

How does convection occur in gases?

• The warmer, less dense gas rises and the cooler, denser gas sinks

• Convection occurs due to the rotation of the Earth

• Convection happens because of the magnetic field of the Earth

• The cooler, less dense gas rises and the warmer, denser gas sinks

What is radiation as a method of heat transfer?

• Transfer of heat through solid particles

• Transfer of heat through gravitational waves

• Transfer of heat through electromagnetic waves

• Transfer of heat through sound waves

How does radiation transfer heat from the sun to the Earth?

• By electromagnetic waves

• By water vapor

• By gravitational force

• By sound waves

What are insulators of heat?

• Materials that conduct heat easily

• Materials that are transparent to heat

• Materials that are good conductors of electricity

• Materials that do not allow heat to pass through easily

Give an example of a good heat insulator.

• metal

• glass

• plastic

• wool

Define heat and its role in everyday life.

• Heat is the feeling of warmth when standing in the sun.

• Heat is the result of mixing different colored paints.

• Heat is the form of energy that is transferred between substances at different temperatures.

• Heat is the process of converting water into steam.

How is heat produced in a fire?

• Reflection

• Evaporation

• Combustion

• Friction