Scientific Principles PPT 8 - Heat, Power and Temperature

Which of the following is a method by which heat can be transferred?

• Conduction

• Insulation

• Reflection

• Absorption

Which of the following is NOT a method of heat transfer?

• Convection

• Radiation

• Conduction

• Evaporation

What is conduction?

• The transfer of heat through or along a material

• The transfer of heat through empty space

• The transfer of heat through liquids only

• The transfer of heat through radiation

Which material is a very good thermal conductor?

• Copper

• Plastic

• Wood

• Rubber

Which of the following is NOT a good thermal conductor?

• Copper

• Aluminum

• Plastic

• Steel

What is a characteristic of materials that are good thermal conductors?

• They are also good electrical conductors.

• They are poor electrical conductors.

• They are always insulators.

• They do not conduct electricity.

Which material is a bad thermal conductor?

• Still air

• Aluminium

• Iron

• Copper

In which states of matter can convection occur?

• Solid

• Liquid and gas

• Plasma

• Solid and liquid

What happens to molecules during convection when they are heated?

• They contract and sink

• They expand and rise

• They remain stationary

• They dissolve

What is the main way a DHWC heats water?

• Conduction

• Radiation

• Convection

• Evaporation