将地球视为一个具有均匀磁场强度的球体而用数学推导出的磁极，称为地球的地磁南北极，是一个用于理论分析地球及其磁场随时空变化的理论值，它与地球南北极并不一致，其间存在11°30'的夹角。
The purpose of this study was to compare the performance of navigation tasks by flight students receiving navigational ground instruction based on a Geographic North versus a Magnetic North Model. Participants in this study were 21 students enrolled in two sections of the Theory of Flight course at...
地磁北极和地理北极之间的夹角角度成为磁偏角。 The daily map instructs is the geography North Pole, but the compass instructs is earth magnetism North Pole.Between earth magnetism North Pole and the geography North Pole's included angle angle becomes the magnetic declination.[translate]...
The Northern Alpine Foreland Basin (NAFB) is a large, peripheral sedimentary basin that extends from eastern France to the north-eastern part of Austria comprising mainly deposits of Eocene to Miocene times (Harzhauser and Rögl 2005; Piller et al. 2007). It was formed due to gravitational...
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What prompt could push students to refine a simple hierarchical notion—“The Sahara is a dry area inside Africa”—and replace it with a more nuanced proximity idea—“The Sahara is near the north shore of Africa”—or a spatial association and inferred cause idea—“The Sahara is caused by...
Lerida is a town located 160 km west of Barcelona whereas Lansarin is a hilly area located 30 km north of Tunis. The ICP-MS analyses were performed just on the edible part of the garlic without its internal bud. 2.2. Study Site Garlic is a bulbiferous vegetable growing underground; ...