Tham khảo tài liệu 'thiết kế bài giảng tiếng anh 9 tập 2 part 7', tài liệu phổ thông, tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 3. What country has the most volcanoes Indonesia has the most volcanoes by far. It is really a special place because there seem to be volcanoes all around In all directions. Merapi which means mountain of fire erupted in January 1994 and killed a few hundred people. 4. Is it true that there are volcanoes in the ocean On the surface of the earth we know of at least 1 500 active volcanoes. I would estimate the ocean contains 10 000 volcanoes We just don t have much chance to see them because they are hidden away 5. Which is the biggest volcano The biggest volcano In the world Is probably Mauna Loa In Hawaii. It rises off of the seafloor to 13 000 feet above sea level or about 29 000 feet above the seafloor. Another huge volcano is Mt. Etna on the island of Sicily in Italy. 6. What is the longest period of time a volcano has been known to be active This Is a tough one to answer because some volcanoes seem to erupt forever stromboli in the Mediterranean of Italy has been known to be erupting for more than 2 000 years. It is the Lighthouse of the Mediterranean. 7. Are all volcanoes mountains or can they be flatlands Some very important volcanoes are not mountains at all. They look like deep lakes because they have had huge eruptions that make the ground sag down. 8. Do people live near volcanoes About 500 million people live close to active volcanoes Most of them do not realize that the earth is very much alive and that they need to pay attention to what it is up to. More people need to learn about volcanoes like you are doing. II. EARTHQUAKE 1. What is the definition of an earthquake An earthquake is the sudden sometimes violent movement of the earth s surface from the release of energy in the earth s crust. 2. How deep the earthquake occur in the world Earthquakes occur in the crust or upper mantle which ranges from the surface to about 800 kilometers deep about 500 miles . 109 3. Where did the largest known earthquake occur A magnitude earthquake in Chile in 1960
