Thermal Insulation and Energy Transfer

Front

What is thermal insulation?

Back

Thermal insulation is a material or method that reduces the transfer of heat between objects or environments, helping to maintain temperature.

Front

What is the principle of energy conservation in a closed system?

Back

In a closed system, the total mass and energy remain constant over time; energy can change forms but cannot be created or destroyed.

Front

What is conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself, typically occurring in solids.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves, such as heat from the sun reaching the Earth.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration, such as perfume spreading in a room.

Front

How does temperature affect the rate of diffusion?

Back

Higher temperatures increase the energy of molecules, causing them to move faster and diffuse more quickly.

Front

What is the role of a thermos?

Back

A thermos is designed to keep liquids hot or cold by minimizing heat transfer through insulation and a vacuum.

Front

What is a vacuum?

Back

A vacuum is a space devoid of matter, which prevents heat transfer by conduction and convection.

Front

What is the difference between thermal conductors and insulators?

Back

Thermal conductors allow heat to pass through easily (e.g., metals), while thermal insulators resist heat transfer (e.g., foam, fiberglass).