2. The first car was invented in 1885 by German Karl Benz. Some say that the car was made to keep the roads clean from horse poo

3. Originally cars were quite slow but with time they got a lot faster.

4. X ray of car

5. 4 stroke engine this is the engine of a normal car. These are the stages 1 petrol enters motor. 2 engine creates spark. 3 releases energy through petrol combustion. 4 pushes waste out exhaust pipe.

6. Bourke engine

7. DOHC or Twin Cam engine 4-cylinder 16-valve DOHC engine DOHC means Double OverHead Cam, or sometimes it could be called "Twin Cam". A DOHC setup is used in most of newer cars. Since it's possible to install multiple valves per cylinder and place intake valves on the opposite side from exhaust vales, a DOHC engine can "breathe" better, meaning that it can produce more horsepower with smaller engine volume. Compare: The 3.5-liter V6 DOHC engine of 2003 Nissan Pathfinder has 240 hp, similar to 245 hp of the 5.9-liter V8 OHV engine of 2003 Dodge Durango. Pros: High efficiency, possible to install multiple valves per cylinder and adopt variable timing. Cons: More complex and more expensive design. by Vlad Samarin

8. DOHC or Twin Cam engine

9. PositiveNegativeInteresting Cars don’t leave a mess on the road. Cars don’t make horse poo but they make a mess by pollution Car designers want to make cars that don’t make pollution. Cars go faster and longer distances than horses. But for a car to do that you need some oil. People dig miles under ground to get oil. Cars are more indestructible than horses But then you have to dig up a hole lot of rock and compress it. There is nothing good about pollution.

10. For a awesome time line go to http://www.yourdiscovery.com/cars/timelin e/ click on the link http://www.yourdiscovery.com/cars/timelin e/ “click on me’’. Said the link.

11. Future cars In the future designers hope to make cars that won’t make pollution.

12. Rev list Wiki Google images Everydayquestions.com samarins.com