Question

1. match the descriptions with the terms.

radiation
a state in which objects in physical contact are at the same temperature and transfer no
heat
thermal expansion
material that does not readily allow the passage of heat, sound, or electricity
insulator
the transfer of thermal energy as the particles of substances collide
thermal equilibrium
the transfer of thermal energy from one object to another using electromagnetic waves
conductor
material that easily transmits heat, electricity, or sound
conduction
decrease in density of a liquid or gas as it increases in temperature
convection
the transfer of thermal energy resulting from the movement of a heated liquid or gas

Explanation:

• Radiation: It is the transfer of thermal energy from one object to another using electromagnetic waves, which matches the description "the transfer of thermal energy from one object to another using electromagnetic waves".
• Thermal equilibrium: It is a state in which objects in physical contact are at the same temperature and transfer no heat, which matches the description "a state in which objects in physical contact are at the same temperature and transfer no heat".
• Insulator: It is a material that does not readily allow the passage of heat, sound, or electricity, which matches the description "material that does not readily allow the passage of heat, sound, or electricity".
• Thermal expansion: It is the decrease in density of a liquid or gas as it increases in temperature (since when a substance is heated, it expands, and density = mass/volume, so volume increase leads to density decrease), which matches the description "decrease in density of a liquid or gas as it increases in temperature".
• Convection: It is the transfer of thermal energy resulting from the movement of a heated liquid or gas, which matches the description "the transfer of thermal energy resulting from the movement of a heated liquid or gas".
• Conduction: It is the transfer of thermal energy as the particles of substances collide, which matches the description "the transfer of thermal energy as the particles of substances collide".
• Conductor: It is a material that easily transmits heat, electricity, or sound, which matches the description "material that easily transmits heat, electricity, or sound".

Answer:

• radiation: the transfer of thermal energy from one object to another using electromagnetic waves
• thermal equilibrium: a state in which objects in physical contact are at the same temperature and transfer no heat
• insulator: material that does not readily allow the passage of heat, sound, or electricity
• thermal expansion: decrease in density of a liquid or gas as it increases in temperature
• convection: the transfer of thermal energy resulting from the movement of a heated liquid or gas
• conduction: the transfer of thermal energy as the particles of substances collide
• conductor: material that easily transmits heat, electricity, or sound