direction was it moving before this change? * changed at 43 million years. * Before this change‚ it was moving north-northwest. [p. 29] 2. If the ocean floor is getting wider‚ why is the Earth not becoming larger? * old ocean floor sinks at subduction zones (trenches) [p. 14] 3. Distinguish between Earth’s crust and mantle. * Crust overlies mantle. It is basalt
Free Earthquake Plate tectonics
Boundary – Oceanic-Continental: When continental and oceanic plates collide the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate. The oceanic plate is forced down into the mantle in a process known as subduction. As the oceanic plate descends it is forced into higher temperature environments. At a depth of about 100 miles (160 km) materials in the subducting plate begin to approach their melting temperatures and a process of partial melting begins.
Premium Plate tectonics
and various small ones. These plates do not move very far very quickly‚ and they usually slide around 5 to 10cm per year. There are three types of boundaries and they are the divergent‚ convergent and transform boundaries. Plates‚ Boundaries and Zones There are about 30 different plates that glide along the mantle. There are three plate boundaries‚ they are the divergent plate boundaries‚ transform plate boundaries and the convergent plate boundaries. Divergent plates move away from each other and
Premium Plate tectonics Earth Volcano
together. If an oceanic plate was involved subduction would occur. Subduction is when two plates converge and one goes under the other. Usually if there are two oceanic plates coming together the older/denser plate would get subducted. If there was a continental plate with an oceanic plate the oceanic plate would subduct‚ because it is denser‚ but it is a whole different story if they are both continental plates. Since they are both continental there is no subduction mainly‚ but there is a collision. They
Premium Plate tectonics
EOSC 114 – Final Review Notes Get A’s or die trying. Jason Kim Unit 1: A Fragile System At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. A single recording station can only calculate distance‚ but not direction; to cover all possibilities‚ a complete circle is drawn around that station. If only two earthquake recording stations are used‚ the circles will overlap at two points. Data from a third recording station will eliminate one of
Premium Management Investment Ethics
April 1st lecture FINAL EXAM IS WORTH 40% Professor goes by Abhi (Obi) like star wars One required textbook Earthquakes science and society lecture will be on additional material not in book but will be guided by materials in the book. take notes (HE SAID IT ALOT!) his lecture slides will not be posted. CH.1 for this lecture Why Learn Earthquakes? Plate Tectonics they are not static they always move. they are moving in a limited space it will cause friction when it moves
Free Earthquake Plate tectonics
EOSC INDIVIDUAL QUIZZES ! 1 BOB ZHAO Which form of energy is related to the distance an object moves times the force moving it? Student Response Correct Answer A. work B. latent heat C. potential energy D. power E. sensible heat Score: 1/1 2 EOSC INDIVIDUAL QUIZZES ! Which prefix used with units represents a billion? Student Response Correct Answer BOB ZHAO A. g B. b C. M D. B E. G Score: 1/1 3 EOSC INDIVIDUAL QUIZZES ! BOB ZHAO The speed at which wave energy propagates
Premium Volcano Earthquake Plate tectonics
10 cities that could be destroyed in the next century. Throughout history‚ there have been cities that have been erected on the land‚ demonstrating how amazing it can be to the invention and ingenuity of man‚ but still with all its progress‚ the strength of the mother nature always impose its authority and supremacy and with that we come to this list‚ because with all our technological advance still can not be a barrier to that nature does not satisfy his whims‚ especially when even now knowing
Premium Human Technology Earth
Geography 241 Review for Cumulative Final Short essay‚ i.e.‚ ones worth 2 pts on the exam - 3/ 4 sentences Medium‚ i.e‚ ones worth 4 pts - 6 sentences Long‚ i.e.‚ the 2 or 3 worth 6 pts on the exam - 8 - 10 sentences Keys: 1. 2. Use examples and locations to help define key concepts Prepare each essay by first recognizing its appropriate length Ch 1 – Introduction (M) Define geography? What is a geographic perspective? How is it unique from others? (See book and lectures) 1. GEOGRAPHY-
Premium Plate tectonics
of 7.0 or greater. The earthquakes that appeared to have occurred along spreading zones made up about 80% of the earthquakes on the map. Earthquakes that have occurred in these areas generally have ocean ridges. The other areas where earthquakes happen are on subduction zones where there usually are ocean trenches and oceanic mountain ranges. About 13% of the earthquakes on the map occurred along subduction zones. Out of all of the earthquakes on the map‚ I would say that about twenty of the quakes
Premium Earth Atlantic Ocean Plate tectonics