ASTR 101 Lecture Notes - Lecture 27: University Of Manchester, Epicenter, Surface Tension

• School: Queen's University
• Department: Physics, Engineering Physics and Astronomy
• Course: ASTR 101
• Professor: David Alan Hanes

Document Summary

Both are surrounded by a thick mantle, and on top of that is a crust. Inner and outer core made principally of metals, such as nickel and iron. Mantle and crust made of rocky material. Centre of earth is very hot, nearly as hot as the face of the sun. Thin oceanic crust (sea floor) and thick continental crust. If we drop a pebble, we can get the mass of the earth. From its size, we can get the volume of the earth. Can then calculate density: earth is about 5. 5 as dense as water. Note: one cubic meter of water weighs 1000 kg a metric ton. A rock this size would weigh several tons. Inconsistency: the everyday rocks we encounter as the surface are only about 3x as dense as water. (kingston"s limestone is only about 2. 5x as dense as water). The material is packed more densely deep in the interior.