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Across 5. Thermal energy, heat and work are related, and the study of the relationships. 6. A material in which heat flows slowly. 7. Is an thermal energy that flows from something at a higher temperature to something at a lower temperature. 9. Measure of the average kinetic energy of the particle in the object. 10. The transfer of thermal energy by collisions between particles in matter. 11. A device that converts heat into work 12. Absorb radiant energy from the sun

Down 1. The heat in a car 2. The Same of the kinetic and potential energy of all the particles in an obje.ct 3. The amount of heat that is needed to raise the temperature of 1 kg of some material by 1 degree C. 4. The transfer of energy by electromagnetic waves. 8. The transfer of thermal energy in a fluid by the movement of warm and cold.