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Unit 12 ReadingUnit 12 ReadingJules Verne: The Father of Science FictionWhen were the inventions in the pictures made?It was invented in the early years of the 20th century.Thomas Edison invented the light bulb in 1879 In 1769 James Watt built a steam-powered boat. Picture 1:Picture 2:Picture 3:Group work: Discuss the questions 1.When was electricity discovered? 2.How was it used in the following two hundred years? 3.In the early 19th century,people had no idea what the inside of the earth might look like.Can you explain what we know about it today? 2.electricity is very important to us. After electricity was discovered, people began to use it to serve people in many fields.Take industry for example, people use it to control machines and produce a great number of products, such as cars, planes, weapons,etc.1.Electricity was discovered in 1600 by Gilbert. Electricity is also used in agriculture. With electricity people can control the temperature and humidity to make vegetables grow better. In our daily life, electricity is very useful. For example, watching TV needs electricity, playing computers needs electricity, heaters need electricity, and even our watches need electricity. So, without electricity, our life would be a mess.Layers beneath the earth’s surface3. What does the inside of the earth look like?剖面图The earth on which we live is a big ball of very hot rock, which consists of three parts: the earth’s crust, the earth’s mantle and the earth’s core. The temperature inside is very high. It’s hot inside but cold outside. It has a shell just like an egg. There are some cracks in the shell of the earth in some places. Hot water shoots into the air through those cracks...