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9. Heat from the sun reaches Earth by A. conduction C. radiation B. convection D. insulation 10. The flow of energy transfer from object to object is A. from higher to lower temperature B. from lower to higher temperature C, from lower to higher temperature then back to lower again D. energy does not transfer 11. The type of heat transfer that is being prevented in a vacuum or thermos flask to keep our drinks hot or cold? A. conduction C. radiation B. convection D. all of the above 12Most of the radiations in a white and or shiny objects are A. absorbed C. transmitted B. reflected D. partly reflected and partly absorbed 13. It has the least value of thermal conductivity. A, air C. plastic B. glass D.tap water 14. A thermos bottle keeps warm liquids warm and cold liquids cold. A thermos bottle must be made from a good A. heat conduction material C. heat expanding material B. heat contracting material D. heat insulation material 15. The correct reading of the this laboratory thermometer is A. 21 °C B. 29 °C C. 31 °C D. 36 °C
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