It is a type of engine commonly used in cars, aircraft, and other machinery. It cycles through four stages, or strokes, called intake, compression, power, and exhaust.
four stroke engine
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15
It is a ring that seals the cylinder head to maintain the proper pressure inside the cylinder and prevent substances from leaking in or out.
head gasket
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15
It is a place within an engine where fuel is compressed and ignited.
combustion chamber
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20
It is the stage in the four-stroke cycle in which a piston moves to the bottom of the cylinder and makes room for fuel and air to enter the cylinder. Fuel and air are forced in through the intake valve.
intake stroke
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lifesaver
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gold
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shark
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baam
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20
It is a type of hybrid vehicle in which the gasoline engine and electric motor can be used at the same time or separately to power the vehicle.
parallel hybrid
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10
If something is ______________, it can withstand a lot of use and stress.
durable
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25
It is a measurement of gas mileage describing how many miles a vehicle can travel per gallon of gas.
mpg (miles per gallon)
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15
A cylindrical plug that moves up and down in the cylinder during combustion.
piston ring
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thief
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10
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25
gold
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shark
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lifesaver
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20
It is the part of a four-stroke engine that houses the valves and often contains passages for transferring excess heat away from the engine.
cylinder head
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10
A device that uses electricity to create a spark to ignite the fuel.
spark plug
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25
It is a type of rechargeable electrical storage device used in many hybrids.
lithium ion battery
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20
It is a biodegradable, renewable fuel source that is made using vegetable oils, animal fat, or grease from restaurants.
biodiesel
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10
It is a fuel, such as natural gas, coal, or oil, that is created through natural processes over millions of years.