P2 Energy transfer by heating

how heat energy passes through solid materials

• conduction

• convection

• radiation

how heat energy passes through liquid or gaseous materials

• conduction

• convection

• radiation

how heat energy can be transferred through a vacuum

• conduction

• convection

• radiation

good insulators would.... (TICK 2)

• be heavy

• contain trapped air

• have a low thermal conductivity

• have a high thermal conductivity

• be made of metal

In an investigation where the number of layers of newspaper wrapped around a hot beaker of water was changed, and the temperature change after 5 minutes was measured...

• the independent variable is the number of layers and the dependent variable is the temperature after 5 minutes

• the dependent variable is the number of layers and the independent variable is the temperature after 5 minutes

• the control variable is the number of layers and the dependent variable is the temperature after 5 minutes

• the control variable is the mass of water and the dependent variable is the number of layers of newspaper

The surface which is the best emitter of infra red radiation is

• a matt black surface

• a shiny black surface

• a matt white surface

• a shiny white surface

The surface which is the worst absorber of infra red radiation is

• a matt black surface

• a shiny black surface

• a matt white surface

• a shiny white surface

The resolution of this digital thermometer is..

• 0.1 ⁰C

• 1.0 ⁰C

• 10.0 ⁰C

• 37.0 ⁰C

The unit of specific heat capacity is

• J/kg⁰C

• J/kg

• J/⁰C

• ⁰C/kgJ

a material that heats up easy has a

• low specific heat capacity

• high specific heat capacity