Question

exam lesson name: energy conversions
exam number: 700697rr
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▶ exam instructions
question 17 of 20 :
select the best answer for the question.

1. the transmission of heat requiring the movement of a liquid or a gas is

○ a. conduction.
○ b. transduction.
○ c. radiation.
○ d. convection.
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Explanation:

To solve this, we analyze each option:

• Option A (conduction): Heat transfer through direct contact of particles, no fluid movement. Eliminate.
• Option B (transduction): Conversion of energy form, not heat transfer via fluids. Eliminate.
• Option C (radiation): Heat transfer via electromagnetic waves, no medium (or fluid) needed. Eliminate.
• Option D (convection): Heat transfer that requires the movement of a fluid (liquid or gas) due to density differences (e.g., hot fluid rising, cold sinking). This matches the description.

Answer:

D. convection