Page 49 - Science Course 1 (Book 2)

Mo8-L2b: What are Thermal Conductors and Insulators

Vaporization is the change of state from a liquid to a Conductors and Insulators
gas. Vaporization that occurs within a liquid is called
boiling. Vaporization that occurs at the surface of a A thermal conductor is a material in which thermal
liquid is called evaporation. energy moves quickly.

A thermal insulator is a material in which thermal
energy moves slowly.

Bubbles cannot be Bubbles can form and
form since vapor rise since the vapor
pressure is less than pressure can overcome
atmospheric pressure atmospheric pressure

Sublimation is the change of state that occurs when a solid changes to a gas without passing through the
liquid state.

Deposition is the change of state from a gas directly to a solid without passing through the liquid state.
Water vapor undergoes deposition when it freezes and forms frost.

Deposition

Sublimation

Key Concept SUMMARY
What are Thermal Conductors and Insulators?
What are Thermal Conductors and Insulators?
Thermal energy is transferred in various ways
How do thermal conductors differ from thermal by particles and waves.
insulators?

Materials vary in how well they conduct
thermal energy.

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