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Across 3. the transfer of thermal energy through circulation of a liquid or gas 4. the direct transfer of energy through electromagnetic waves 6. a breeze blowing from the land to the sea at night 8. states that when two surfaces rub together, the parts that touch resist movement 10. a mechanism used to cool an engine; allows hot fluid to circulate 11. the random movement of particles in a gas or liquid 14. a cooling breeze from the sea in the daytime 15. the energy an object has related to its motion 16. not extreme 17. observed the movement of pollen grains in water, now known as Brownian motion 18. a measure of how hot or cold something is

Down 1. caused by the rising of heated liquid or gas and sinking of cooled liquid/gas 2. a liquid or gas used to remove heat from something 5. energy contained within a system that is responsible for its temperature 7. the energy that is transferred from a warmer substance to a cooler one 9. when cool air sinks and moves down the slope of a mountain 12. transfer of heat by direct contact 13. a force that holds back movement of a sliding object;