How is heat transferred through convection?A.Heat is transferred through contact between molecules.B.Heat is transferred by light being changed into kinetic energy.C.Heat is transferred by energy waves moving through space.D.Heat is transferred by the movement of a liquid or gas.
Question
How is heat transferred through convection?A.Heat is transferred through contact between molecules.B.Heat is transferred by light being changed into kinetic energy.C.Heat is transferred by energy waves moving through space.D.Heat is transferred by the movement of a liquid or gas.
Solution
Heat is transferred through convection by the movement of a liquid or gas. This process involves the following steps:
- When a liquid or gas is heated, it expands and becomes less dense than the surrounding cooler liquid or gas.
- Because of this difference in density, the warmer, less dense liquid or gas rises.
- As the warmer liquid or gas rises, it displaces the cooler, denser liquid or gas, which then sinks.
- This sinking and rising process creates a cycle of movement known as a convection current.
- Through this convection current, heat is transferred from one place to another.
So, the correct answer to your question is D. Heat is transferred by the movement of a liquid or gas.
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How heat is transferred?*
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