ERS120H5 Lecture Notes - Lecture 2: Mid-Ocean Ridge, Big Bang, Plate Tectonics
Document Summary
Lithosphere rocky surface and interior of the earth. Hydrosphere all water on earth in liquid and frozen states. Atmosphere the gaseous envelope around the earth. Biosphere all of earth"s living matter. Environmental hazards like volcanic eruptions, landslides, floods, earthquakes. Big bang theory is where the universe originated billions of years ago in an explosion from a single point of nearly infinite energy density. Nebula dust and debris left as result of explosion, heavier material moves to centre, called a protostar. Fusion reaction begins and becomes a star. Protoearth is rotating around the sun, then a smaller planet collides, and thus the moon forms from the ring of debris. Shear waves will not travel through a liquid. Glaciers are not able to move from water to land. Wars cause research and thus discovered seafloor patterns (topography) Great global rift is an area of ocean ridges. Primary waves travel 40% faster than secondary waves.
