World Mourns Loss of Skier. U.S. Freeskiing, and the entire U.S. Ski and Snowboard Association family, joined the Park City community in mourning the passing of Sam Jackenthal, a wonderful young man and a remarkable athlete.
The least dense layer of the earth is the Crust , the mantle is second densest , whereas the core is the most dense layer of the earth
This drawing shows the different layers of the atmosphere. The ground is shown in brown at the bottom of the picture. The altitude in kilometers is given on the right hand scale and is approximate. Troposphere: This is the lowest atmospheric layer and is about seven miles (11 km) thick.