1. What is the direction of heat transfer? A. from hot to cold C. from cold to hot B. from bottom to top D. from side to side 2. How is heat transferred in solid materials? A. through convection C. through conduction B. through radiation D. through vacuum 3. What happens to a liquid when heated? A. It remains the same. C. It increases in temperature. B. It increases in volume D. It increases its water level. 4. What energy transfer is shown through direct contact of the heat source and the body receiving the heat? A. conduction C. heat B. convection D. radiation 5. When heat is transferred through gases it is called A Convection C. Radiation B. Conduction D. Roasting
