I want to know some pints about car
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A car is a road vehicle used to carry passengers. It is also called an automobile, which comes from the Greek word "auto" and the French word "mobile". This name means "self-moving", as cars do not need horses or other external sources of power to move. Cars usually have four wheels and get their power from an engine. Millions of cars were made during the 20th century.
TechnologyEdit
Like other vehicles, cars are made in different shapes and sizes, for people with different needs. Some small "city" cars carry only two to four people, with only small space for luggage. Other types are able to carry many passengers or heavy loads. For example, station wagons or estate cars carry from 5 to 9 people, or fewer people with lots of luggage. There are many different sizes of vans, such as minivans, which are made for families, and even small pickup trucks, which are car-like vehicles made for carrying medium-sized loads; for example, goods for delivery or plumber's and builder's tools and materials. Heavy lorries are used to carry deliveries and heavy loads.
In order for a car to work, it must have a power source, where the car gets the energy it needs to turn the wheels. Most cars use some kind of fuel to make an internal combustion engine run. The power from the engine then goes to the wheels through a transmission, which has a set of gears that makes the car go faster or slower. The most common fuel in small to medium-size cars is petrol, which is called gasoline in America (people just call it "gas" though). Some larger, more expensive cars burn diesel fuel, which is used in big trucks and buses, and a few use wood gas. In some countries, such as Brazil and Sweden, a mixture of ethanol and petrol, called gasohol in Brazil and E-85 in Sweden, is used as automobile fuel. There are cars designed to run on more than one type of fuel - these are called "flex-fuel" and are very rare.
Alternative fuel carsEdit
All of these types of fuel are called fossil fuels because they come from fossilsthat were made millions of years ago. Over time, they turn into oil, which is then drilled up from deep inside the Earth, and then turned into fuel by chemical changes. Because there are so many cars around us today, there will be one day when there is no more oil left in the ground. When that happens, we will not be able to make any more fuel to run our cars. This is why fossil fuels are non-renewable resources. Also, burning fuel in an engine produces a lot of exhaust, which can go up into the atmosphere and cause global warming. This is also going to be a problem in the coming years.
Solar powered car
To solve these problems, scientists and engineers are coming up with alternative fuel vehicles, which use fuels that are less common, but are renewable and will never run out. They include propane, natural gas, compressed air, and ethanol (which comes from plants). More recently, there are cars that run on electricity. These can come in different types. They may store electricity in a battery (as in the Nissan Leaf), or generate it from hydrogenfuel cells (like the Honda Clarity). The electricity then drives an electric motorinstead of an engine, which then turns the wheels. These cars are much quieter than other cars and do not give out any polluting exhaust gasses (although some ecologists say that most of the hydrogen that people use comes from burning fossil fuels). Cars that use batteries can be recharged in different ways, usually from a power outlet, but some even use solar cells. There is a competition every year where people try to design a car that can last the longest and go the farthest on solar energy alone.
There is also a type of car that uses both an internal combustion engine and an electric motor. This is called a hybrid electric vehicle and an example is the Toyota Prius.
HistoryEdit
TechnologyEdit
Like other vehicles, cars are made in different shapes and sizes, for people with different needs. Some small "city" cars carry only two to four people, with only small space for luggage. Other types are able to carry many passengers or heavy loads. For example, station wagons or estate cars carry from 5 to 9 people, or fewer people with lots of luggage. There are many different sizes of vans, such as minivans, which are made for families, and even small pickup trucks, which are car-like vehicles made for carrying medium-sized loads; for example, goods for delivery or plumber's and builder's tools and materials. Heavy lorries are used to carry deliveries and heavy loads.
In order for a car to work, it must have a power source, where the car gets the energy it needs to turn the wheels. Most cars use some kind of fuel to make an internal combustion engine run. The power from the engine then goes to the wheels through a transmission, which has a set of gears that makes the car go faster or slower. The most common fuel in small to medium-size cars is petrol, which is called gasoline in America (people just call it "gas" though). Some larger, more expensive cars burn diesel fuel, which is used in big trucks and buses, and a few use wood gas. In some countries, such as Brazil and Sweden, a mixture of ethanol and petrol, called gasohol in Brazil and E-85 in Sweden, is used as automobile fuel. There are cars designed to run on more than one type of fuel - these are called "flex-fuel" and are very rare.
Alternative fuel carsEdit
All of these types of fuel are called fossil fuels because they come from fossilsthat were made millions of years ago. Over time, they turn into oil, which is then drilled up from deep inside the Earth, and then turned into fuel by chemical changes. Because there are so many cars around us today, there will be one day when there is no more oil left in the ground. When that happens, we will not be able to make any more fuel to run our cars. This is why fossil fuels are non-renewable resources. Also, burning fuel in an engine produces a lot of exhaust, which can go up into the atmosphere and cause global warming. This is also going to be a problem in the coming years.
Solar powered car
To solve these problems, scientists and engineers are coming up with alternative fuel vehicles, which use fuels that are less common, but are renewable and will never run out. They include propane, natural gas, compressed air, and ethanol (which comes from plants). More recently, there are cars that run on electricity. These can come in different types. They may store electricity in a battery (as in the Nissan Leaf), or generate it from hydrogenfuel cells (like the Honda Clarity). The electricity then drives an electric motorinstead of an engine, which then turns the wheels. These cars are much quieter than other cars and do not give out any polluting exhaust gasses (although some ecologists say that most of the hydrogen that people use comes from burning fossil fuels). Cars that use batteries can be recharged in different ways, usually from a power outlet, but some even use solar cells. There is a competition every year where people try to design a car that can last the longest and go the farthest on solar energy alone.
There is also a type of car that uses both an internal combustion engine and an electric motor. This is called a hybrid electric vehicle and an example is the Toyota Prius.
HistoryEdit
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