If you’re like me, this is a scene you look forward to every summer: riding one of the greatest inventions in amusement history – the roller coaster.PREVIEW STATEMENT:Today I’d like to tell you about the history of the roller coaster, how they work, and what some of the most famous rides in the world are.CONCLUSION:
First I explained the history and development of the roller coaster, then how they worked and lastly some notable rides around the world. Next time you are waiting in anticipation for that roller coaster ride, I hope you’ll think about the history and many aspects that went in to the making of that coaster. 5.Performance-Enhancing DrugsImagine that you’re one of an elite group of students fighting for a spot at the top of your class. You’re fully aware of the implications of an upcoming exam. If you blow it, you lose your rank. However, a good grade virtually assures you of prestige and a comfortable job.So you look for that extra edge – a little something to push your already strained mind further. If there was a pill that would increase your mental sharpness for a short period of time and ensure you a high score, chances are many of you would consider taking it.Amateur and professional athletes are faced with a similar dilemma every day of their competitive lives. In thenever-ending search for the extra edge in sports, many athletes have given in to the lure of performance enhancing drugs.PREVIEW STATEMENTToday I will be talking with you about the types of performance enhancing drugs used by athletes, side effects and dangers of these drugs and what the sports industry is doing to combat their use. CONCLUSIONIn conclusion, no matter how safe you think taking these drugs will be, the risk will always outweigh the edge given to the athlete. The risk to their health and their athletic career isn’t worth a temporary competitive edge.The best bet in life is to just work hard and do your best. 6.LaughterThe neural circuits in your brain begin to reverberate. Chemical and electrical impulses start flowing rapidly through your body. Your pituitary gland is stimulated. Hormones and endorphins race through your bloodYour body temperature rises by half a degree. Your pulse and blood pressure increase. Your arteries and chestmuscles contract, your vocal chords quiver, and your face contorts. Pressure builds in your lungs. Your lower jaw suddenly becomes uncontrollable and breath bursts from your mouth at 70 miles an hour.This is surely no laughing matter. Or is it? This is a medical description of what happens in your body during a burst of laughter. It sounds dreadful, but we all know it feels great.PREVIEW STATEMENTToday I am going to talk to you about the how laughter can boost your mood and why people says it’s the best medicine.