Author: wentao chen

天文学Moon Formation 1.What is the main purpose of the lecture A. To compare the composition of the Moon with the composition of Earth B. To explain the significance of moon …

地质学Isthmus of Panama 1. What is the lecture mainly about? A. How the Atlantic Ocean became connected to the Arctic Ocean B. How changes in ocean circulation affected the Isthmus …

地质学Predict Volcanic Eruption 1.What is the main purpose of the lecture? A To explain why volcanic eruptions are predictable but earthquakes are not. B To describe changes that help scientists …

地质学Plate Tectonics 1. What does the professor mainly discuss? A. A theory about the breakup of the Gondwanan supercontinent during the Cambrian period. B. A possible relationship between plate tectonics …

地质学Younger Dryas 1.What is the lecture mainly about? A. To illustrate similarities between two periods of climate change B. To examine theories about the extinction of large North American mammals …

地质学Rift 1.What is the lecture mainly about? A. The recent discovery of an unusual tectonic plate B. The effects of underwater riffs on plate boundaries located on land C. The …

地质学Snowball Earth 1.What is the main purpose of the lecture? A. To explain how geologists determine the dates of ice ages B. To compare the geologic features of several different …

化学Nanotechnology 1.What does the professor mainly discuss? A. The design of mechanical vehicles on a microscopic scale. B. The use of modified bacteria to power microscopic machines. C. Ways that …