:CoNtExT
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.When you start your car, do you think about chemistry? Probably not, but you should
The power to start your car is furnished by a lead storage battery. How does this battery work, and what does it contain? When a battery goes dead, what does that mean? If you use a
friend’s car to “jump start” your car, did you know that your battery could explode? How can
,you avoid such an unpleasant possibility? What is in the gasoline that you put in your tank
and how does it furnish the energy to drive to school? What is the vapor that comes out of
the exhaust pipe, and why does it cause air pollution? Your car’s air conditioner might have
a substance in it that is leading to the destruction of the ozone layer in the upper .atmosphere
?What are we doing about that? And why is the ozone layer important anyway
:ImPoRtAnT wOrDs & PhArAsEs
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furnished to supply or provide something
lead a soft heavy grey metal that melts easily and is poisonous, used to cover roofs, or in the past, for water pipes. It is a chemical element: symbol Pb
storage when you keep or put something in a special place while it is not being used
jump start to start a car whose battery has lost power by connecting it to the battery of another car
explode to burst, or to make something burst, into small pieces, usually with a loud noise and in a way that causes damage
unpleasant not pleasant or enjoyable
possibility if there is a possibility that something is true or that something will happen, it might
be true or it might happen
gasoline a liquid obtained from petroleum, used mainly for producing power in the engines of cars, trucks etc
vapor a mass of very small drops of a liquid which float in the air, for example because the liquid has been heated
exhaust pipe a pipe on a car or machine that waste gases pass through
pollution the process of making air, water, soil etc dangerously dirty and not suitable for people to use, or the state of being dangerously dirty
air conditioner a machine that makes the air in a room or building cooler and drier
leading to take someone somewhere by going in front of them while they follow, or by pulling them gently
destruction the act or process of destroying something or of being destroyed
ozone layer a layer of gases in the sky that prevents harmful radiation from the sun from reaching the Earth
upper in a higher position than something else
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Longman dictionary of contemporary English
