Heat Transfer Concepts

Which of the following processes requires no medium to transfer heat?

• Conduction

• Convection

• Radiation

• Insulation

Which statement is true about radiation?

• Electromagnetic waves transfer radiant energy

• Radiation is only produced by nuclear reactions

• All radiation is harmful to living organisms

• Radiation can only travel through solid materials

What is the thermal transfer taking place at the metal base of the pot?

• Convection

• Radiation

• Conduction

• Evaporation

What is the thermal transfer taking place at the waves reaching point C?

• Conduction

• Convection

• Radiation

• Insulation

What is the thermal transfer taking place at the handle A, made of metal?

• Convection

• Radiation

• Conduction

• Evaporation

What is the thermal transfer taking place at the water B?

• Conduction

• Convection

• Radiation

• Insulation

A material in which thermal energy moves easily is a(n) _____

• insulator

• conductor

• semiconductor

• superconductor

What type of heat transfer is responsible for the transfer of heat from the sun to Earth?

• Conduction

• Convection

• Radiation

• Insulation

Explain how the water at the top gets hot although the heat is supplied at the bottom.

• The water at the top is heated directly by the heat source.

• The metal base of the pan conducts heat to the water at the bottom, causing convection currents.

• The water at the top absorbs heat from the air above it.

• The water at the top is heated by radiation from the stove.