Uncategorized Chapter 8: Transmission of Heat Class 7 MCQS by Shoaib GabolFebruary 2, 2024May 1, 2024 Transmission of Heat ( PART 2 ) 1. Which of the following is the best insulator of heat? Copper Aluminum Glass Styrofoam 2. What happens to the molecules in a substance when heat is applied? They stop moving They decrease in speed They increase in speed They remain unaffected 3. What causes convection currents in a fluid? Radiation Expansion Conduction Differences in density due to temperature variations 4. Which material is a poor conductor of heat? Plastic Copper Silver Iron 5. What happens to the particles of a substance during conduction? They vibrate but do not move from their positions They move from a hotter region to a cooler region They gain energy and evaporate They move from a cooler region to a hotter region Loading … Pages: 1 2
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