Lower Secondary: Conduction

Objects at the same temperature is said to be in thermal _.

If two objects have different temperatures, heat will flow from the cooler object to the warmer one.

• True
• False

Check the three processes of heat transfer.

• Conclusion

• Conduction

• Condition

• Convection

• Radiation

Conduction is the transfer of thermal energy...

• in the form of electromagnetic waves such as infrared radiation without the aid of a medium

• through a medium without any movement of the medium

• by means of convection currents in a fluid (liquid or gas), due to a difference in density

• None of the above

Which material is the best conductor of heat?

• Wood
• Plastic
• Glass
• Steel

Why do metals conduct thermal energy more quickly?

• Particles vibrate faster
• Due to the presence of bound electrons
• Due to the presence of free electrons
• Metals are grey

Why are gases poor conductors of electricity?

• Particles are close together and collisions are more frequent
• Particles are far apart and collisions are less frequent
• Particles are close together and collisions are less frequent
• Particles are far apart and collisions are more frequent

Which state of a substance is the best conductor of heat?

• Solid

• Liquid

• Gas

If you burn your hand on the handle of a hot pot, heat was transferred to your skin by

• conduction

• convection

• radiation

• equilibrium

Ironing a shirt is an example of...

• condensation

• conduction

• convection

• radiation