Lesson 1 NapoleonToday, Im going to talk to you about one of the most important historical figures in European history: Napoleon Bonaparte. Let s start by talking about his early life. Napoleon was born in 1769 on the island of Corsica. When he was only 10 years old, his father sent him to military school in France. Napoleon was not a very good student in most of his classes, but he excelled in mathematics and military science. When he was 16 years old,he joined the French army. In that year 1785,he began the military career that would bring him fame ,power,riches and finally defeat. Napoleon became a general in the French army at the young age of 24. Napoleon had many victories on the battlefield but he also became involved in French law and politics. And in 1804, at the age of 35,he became the first emperor of the France.Napoleon was many things. He was, first of all, a brilliant military leader. His soldiers were ready to die for him. As a result, N.won many military victories. At one time he controlled most of Europe, but some countries, including England, Russia, and Austria fought fiercely against him. His defeat “his end”came when he decided to attack Russia. In this military campaign against Russia, he lost most of his army.The great French conqueror died alone deserted by his family and friends in 1821. Napoleon was only 51 years old when he died.=Lesson 2 Pompeii The lecture for this class is about the city of Pompeii. A natural disaster occurred there almost 2000 years ago.Today many rich people who live in large metropolitan areas such as Beijing, Paris and New York leave the city in the summer. They go to the mountains or to the seashore to escape the city noise and heat.2,000 years ago, wealthy Romans did the same thing.They left the city of Rome in the summer. Many of these wealthy Romans spent their summers in the city of Pompeii, a beautiful city, located on the Bay of Naples.In the summer of the year 79 C.E., a young Roman boy who later became a very famous Roman historian was visiting his uncle in P The boys name was Pliny the Younger. One day Pliny was looking up at the sky. He saw a frightening sight. It was a very large dark cloud. This black cloud rose high into the sky. What Pliny saw was the eruption of the volcano called Mount Vesuvius.Rock and ash flew through the air. The city of P . was at the foot of Mt. V When the volcano first erupted, many people were able to get out of the city and to escape death. In fact, 18,000 people escaped the terrible disaster. Unfortunately, there was not enough time for everyone to escape. More than 2,000 people died. These unlucky people were buried alive under the volcanic ash.The eruption lasted for about 3 days. When the eruption was over, P . was buried under 20 feet of volcanic rock and ash. The city of P . was forgotten for almost 1,700 years.In the year of 1748 an Italian farmer was digging on his farm. As he was digging, he uncovered a part of a wall of the ancient city of P Soon archaeologists began to dig in the area. As time went by, much of the ancient city of P. was uncovered. Today tourists come from all over the world to see the ruins of the famous city of Pompeii.=Lesson 4 Roller CoasterLets talk about the physics involved in a ride on a roller coaster. Im sure many of you have taken a ride on a roller coaster. A simple roller coaster consists of a frame with a track on it. The track is very much like a train track, this track goes over a series of hills and around curves. It follows a path that ends at the same place it started. A train of cars travels around on this track, very fast. The cars have two sets of wheels. One set of wheels rolls on top of the track, and the others set of wheels rolls below the track. The wheels below the track keep the fast moving cars from coming off the track, roller coaster cars as you probably know dont have any motors or engines. Instead, a chain pulls the cars up the first, tallest and steepy staff hill, this is how the ride begins. Then, at the top of the hill the chain comes off the cars and gravity takes over. gravity pushes the cars down the other side of the hill. the taller and steeper the first hill is, the faster the ride will be. And the farther the cars will travel. as the cars rolled downhill they gained speed. the cars have enough speed and energy to send them up the next hill. as the cars near the top of the second hill they begin to slow down. but then, the cars reached the top of that hill, and start down the other side. gravity again pushes them toward the ground. this process repeats on each hale. Okay, so lets go over this process again. first, the cars are pulled by a chain up the first highest hill. then they go down a very steep slope, at this point, there is enough energy to pull the cars up and over the next hill. when they reached the bottom of tha