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4
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a long metal bar in a vehicle’s engine that is connected to the wheels and changes power into movement
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7
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A small electric heating element in an internal-combustion engine that facilitates starting by preheating the air in a cylinder and is used especially in diesel engines.
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8
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the tube in an engine that a piston moves backward and forward
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9
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chemicals and other substances that have a harmful effect on air, water, or land
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10
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o press or squeeze something so that it fits into a smaller space
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12
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able to stay in good condition for a long time and after being used a lot
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13
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to make something start to burn
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14
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the movement of something in a circle around something else, either once or continuously
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1
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one of several parts on the outside of a wheel that fit into the holes in something such as a chain or a piece of film and pull or turn it when the wheel turns
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2
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gases or steam produced by an engine as it works
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3
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the part of a machine or piece of equipment that opens and closes in order to control the flow of air or liquid
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4
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An enclosure in which combustion, especially of a fuel or propellant, is initiated and controlled.
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5
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a substance such as oil, gas, coal, or wood that produces heat or power when it is burned
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6
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an oil reservoir in an internal combustion engine
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11
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to close a container or space by covering it with something so that air or other substances cannot get in or out
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15
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a hole or crack in an object or container that a liquid or gas comes out of
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16
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a loud or unpleasant sound
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