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| 1. | Earthquakes are a kind of tectonic hazards【構造災害】 that are related to the internal structure of our planet【星球】. The Earth is divided into three layers. The innermost layer is the core【地核】, the middle layer is the mantle【地幔】 and the outermost layer is the crust【地殼】. |
| 2. | The crust is composed of【由什麼......組成】 several large rock pieces called plates【板塊】. The area where two plates meet is called a plate boundary【板塊邊界】. The movement of plates is driven by convection currents【岩漿對流】 in the mantle【地幔】. |
| 3. | The hottest and the densest【最高密度】 part of the Earth is the core【地核】. The part of the Earth where has the lowest temperature and density【密度】 is the crust【地殼】. The middle layer of the Earth is the mantle【地幔】, which is made up of solid rock and semi-molten【半熔岩漿】 rock called magma【岩漿】. |
| 4. | The Earth’s crust is composed of several plates which are the Eurasian Plate【歐亞板塊】, the African Plate【非洲板塊】, the Indo-Australian Plate【印度-澳洲板塊】, the Pacific Plate【太平洋板塊】, the North American Plate【北美洲板塊】 and the South American Plate【南美洲板塊】. |
