Traditionally, the earth's surface has been modeled as a sphere, but the world geodetic system of 1984 (wgs-84) uses an ellipsoid as a more accurate model. it places the center of the earth at the origin and the north pole on the positive z-axis. the distance from the center to the poles is 6356.523 km and the distance to a point on the equator is 6378.137 km. (a) find an equation of the earth's surface as used by wgs-84.

East asia is considered a less developed nation. true or false

Directions you probably already know that people have different ways to organize their ideas. some people make lists or outlines, some draw pictures, while others may combine these two methods. experiment with different note-taking techniques to find the one which works best for you. one common note-taking technique is webbing. webbing uses the sizes of circles to indicate the importance of items. lines are used to indicate the relationships between items. the example below is based on the information presented in a previous lesson. notice that the circle for "geography is" appears at the center of the web. it has larger than the circles that surround it. the "geography " circle is surrounded by smaller circles of earth's atmosphere, earth's climate, earth's surface. notice the lines that connect these items to the concept of geography. notice that the circles surrounding atmosphere are smaller. also observe that the lines that connect the items and indicate the relationships between the items. webbing will you capture the most important points in your lessons. beginning with lesson two, geographic tools: globes and maps, use webbing to take notes on the important information in this unit. hint: it will be easier to complete this project if you take your notes after completing each lesson.

Explain how earths tilt and revolution around the sun affects weather and climate