P2 Thermal Conductivity Quiz

What does the thermal conductivity of a material tell you?

• How quickly energy is transmitted through it by thermal conduction

• How much energy it can store

• How much it expands when heated

• How quickly it cools down

Which of the following factors does NOT affect the rate of heat loss from a building?

• The thickness of its walls and roof

• The thermal conductivity of its walls and roof

• The color of its walls and roof

• The temperature difference between the inside and outside

What is a thermal insulator?

• A material with high thermal conductivity

• A material with low thermal conductivity

• A material that absorbs heat quickly

• A material that reflects light

Which equation is used to calculate the energy transferred to the thermal store of a substance?

• E = mc^2

• ΔE = m × c × Δθ

• F = ma

• P = IV

What does the specific heat capacity of a material represent?

• The amount of energy needed to raise the temperature of 1 kg of the substance by 1°C

• The amount of energy needed to melt 1 kg of the substance

• The amount of energy needed to vaporize 1 kg of the substance

• The amount of energy needed to cool 1 kg of the substance by 1°C

What does a material’s thermal conductivity tell you?

• How well it conducts heat

• Its density

• Its melting point

• Its electrical conductivity

Which materials have low thermal conductivity?

• Metals

• Thermal insulators

• Liquids

• Gases

Give three factors that determine the rate of thermal energy transfer through a material.

• Color, shape, and size

• Thermal conductivity of material, temperature difference, thickness of material

• Weight, volume, and density

• Hardness, flexibility, and elasticity

What factors affect the rate of heat loss from a building?

• Thickness of walls and roof, thermal conductivity of walls and roof, the temperature difference between the two sides of the wall/roof

• Color of the walls, type of flooring, number of windows

• Height of the building, number of floors, type of paint used

• Age of the building, type of foundation, number of doors

Define specific heat capacity.

• The amount of energy needed to raise the temperature of 1 kg of a material by 1 °C

• The amount of energy needed to melt 1 kg of a material

• The amount of energy needed to vaporize 1 kg of a material

• The amount of energy needed to cool 1 kg of a material by 1 °C