Grade 12 Physics Heat Quiz

What is conduction and how does it occur?

• Conduction occurs when heat is transferred through the movement of fluid particles.

• Conduction is the transfer of heat through direct contact between particles.

• Conduction is the transfer of heat through electromagnetic waves.

• Conduction is the transfer of heat through the emission of light.

Explain the concept of thermal conductivity and its role in conduction.

• Thermal conductivity is the ability of a material to reflect heat. It determines how much heat a material can bounce off.

• Thermal conductivity is the ability of a material to conduct heat. It determines how well a material can transfer heat through conduction.

• Thermal conductivity is the ability of a material to absorb heat. It determines how well a material can retain heat.

• Thermal conductivity is the ability of a material to generate heat. It determines how much heat a material can produce.

What is radiation and how does it differ from conduction and convection?

• Radiation is the transfer of heat through chemical reactions.

• Radiation is the transfer of heat through sound waves.

• Radiation is the transfer of heat through solid materials.

• Radiation is the transfer of heat through electromagnetic waves.

Describe the process of heat transfer through radiation.

• Conduction of heat through solids

• Mechanical waves transferring heat

• Convection of heat through liquids and gases

• Electromagnetic waves

Define specific heat capacity and explain its significance in relation to heat.

• The amount of heat required to lower the temperature of 1 kilogram of a substance by 1 degree Celsius.

• The amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius.

• The amount of heat required to change the state of 1 kilogram of a substance from solid to liquid.

• The amount of heat required to raise the temperature of 1 kilogram of a substance by 1 degree Celsius.

How does the specific heat capacity of a substance affect its ability to store heat?

• It has no effect on the substance's ability to store heat

• It affects the substance's ability to store heat by determining how much heat energy it can absorb or release.

• It increases the substance's ability to conduct electricity

• It decreases the substance's ability to change state

What is thermal expansion and how does it occur in different materials?

• Thermal expansion is the tendency of matter to shrink in response to a change in temperature.

• Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature. It occurs in different materials due to the increase in kinetic energy of the particles, causing them to vibrate and move further apart.

• Thermal expansion occurs in different materials due to the decrease in kinetic energy of the particles.

• Thermal expansion is the tendency of matter to change color in response to a change in temperature.

Explain the concept of linear expansion and provide an example of its application.

• Linear expansion is used in cooking to explain how food expands when heated

• Linear expansion is a concept used in computer programming to expand the memory of a device

• Linear expansion is the process of expanding a company's product line to include new items

• One example of its application is in the design of bridges and railways, where engineers need to account for the expansion and contraction of materials due to temperature changes.

Discuss the different methods of heat transfer and provide examples of each.

• Reflection, absorption, and transmission

• Conduction, convection, and radiation

• Evaporation, condensation, and sublimation

• Expansion, compression, and diffusion

How does heat transfer occur in fluids and solids, and what are the differences between the two processes?

• Conduction in fluids and convection in solids

• Convection in fluids and conduction in solids

• Radiation in fluids and conduction in solids

• Convection in fluids and radiation in solids