Layers of the Earth : Part-Whole Comparisons Name: Directions: use the data table for the average thickness, to find the percent thickness of each layer. Average Thickness of the Layers of Earth http://yubs.usgs.gov/gip/nterior/ Crust 30 Kilometers Mantle 2,891 Kilometers Outer Core 2,259 Kilometers Inner Core 1,221 Kilometers Total _6401 Kilometers Crust 0.47 % Outer Core 35.3 % Find the % Find the % of total thickness of Earth of totaltbiekness of Earth 0.0047 30 Percent means %3D 100 100 "per 100 6401 part %3D Mantle 45.1 % Inner Core 19.07 % whole 100 Find the % Find the % of total thickness of Earth of total thickness of Earth 2891 0.451 %3D 6401 100 100

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.