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Across 1. heat transfer from object to object by touching 4. anything that changes the state of rest or body of motion 7. the result of converting potential energy to mechanical power by a spark or compression 11. internal combustion engine that converts heat energy to mechanical energy, up to 25 hp 13. lowest point where a piston can move in chamber 14. fourth stroke, where combustion products like carbon monoxide are removed from combustion chamber 15. engine with a cycle of intake/compression and power/exhaust. light, used in many positions not only horizontal 17. engine that generates heat energy from combustion of fuel inside the engine 18. unit of powr equal to 746 watts or 33,000 lb ft/min 19. type of engine that requires a sparkplug to ignite fuel 22. stroke that squishes fuel/air mix in combustion chamber to increase likelihood of ignition 24. highest point where a piston can move in chamber 26. moving energy 27. the ability to do work 28. series of events such as( intake,compression, power, exhaust) that are repeated 29. cooling system of engine, fans, or channels to remove heat from liquid 31. measured in farenheit and celcius

Down 2. type of engine that requires compression of fuel to ignite and 3. anything with mass (referring to force) 5. part of the engine where combustion takes place (there can be one or many) 6. simple machine that consists of a bar which pivots on a fulcrum 8. force acting on a perpendicular radial distance from a point 9. stored energy 10. heat transfer from object to object through currents in a fluid 12. the total volume of engine cylinder that the piston moves on one full stroke 14. machine that converts energy into mechanical force 16. engine with cycle of intake,compression, power, exhaust, used in horizontal positions, more efficient, heavier 20. measurement of pressure acting on a specific unit of area 21. heat transfer tht occurs as radiant heat without a material to carry it away 23. stroke that pulls fuel/air into combustion chamber 25. amt of heat reqd to increase temp of 1 gram of water 1 degree C. 30. british thermal unit, amt of heat reqd to increase 1 lb of water 1 deg F