OCE 1001 Exam 1 1 Drag and drop into labels Crust Is Earth s stiff rigid rocky shell Part of this layer has a relatively homogeneous composition while another part is composed of many rock types Is completely solid Contains a weak layer below the lithosphere Contains rock rich in magnesium and iron Mantle Core Contains iron and nickel Contains a liquid outer layer and a solid inner layer 2 Looking at a picture determine which feature is most likely to be accreted onto a continent Galapagos Rise 3 Select all that apply After accretion which tools could a geologist use to differentiate between a terrane and the continent onto which it accreted Use paleomagnetic data to tell if the rocks have shifted position significantly Paleomagnetism is the study of magnetic properties of a rock to determine the record of Earth s magnetic field Look for fossils that are distinct from those of the continent Look at the rock types and determine if they are distinctly different from the continent 4 The largest of the ocean basins which currently covers more than half of the ocean surface is the Pacific Ocean 5 The important contribution to navigation made by Eratosthenes in the third century BC was A reasonably accurate calculation of the circumference of our planet 6 The first humans from Western Hemisphere known to have developed the art of navigation were the Phoenicians Eratosthenes 7 The first person we are aware of who determined the circumference of the Earth using trigonometry and the angle of sunlight at Alexandria Egypt was 8 In science which one of the following would be considered an observation Waves are seen to approach the beach at an angle 9 A tentative testable statement about the general nature of a phenomenon is called a an Hypothesis 10 Of the following statements about density stratification which is are true All except Density stratification caused the oxygen crisis on Earth The time periods of the geologic time scale are based on events caused by density stratification 11 Earth s current atmosphere supports animal life because Plant photosynthesis provides oxygen that is critical for aerobic respiration 12 The Sun and the rest of the solar system formed about 5 billion years ago from a huge cloud of dust and gas called a Nebula 13 The separation of the Earth into layers while it was molten was the result of the Differing densities of the elements that make up the Earth 14 Which of the following statements regarding continental and oceanic crust is TRUE Continental crust is thicker and less dense than oceanic crust 15 Which of the following ideas about the development of life on Earth make scientific sense All except The most primitive life on Earth needed sunlight to metabolize food 16 Current scientific knowledge indicates that the most likely origin of most of Earth s oceans was due to Water vapor released from volcanic outgassing 17 The lithosphere consists of Earth s Crust and uppermost mantle 18 The water in Earth s oceans came Mostly from volcanic outgassing and partly from comets 19 Earth is about 4 6 billion years old 20 Core Composed mostly of iron and nickel with a liquefied metallic outer layer 21 Label G Feature Process Transform fault Transform faulting A Feature Volcanic arc D Process Subduction B Feature Trench C Feature Mid ocean ridge E Process Mantle convection F Process Sea floor spreading 22 Label E Eurasion A Pacific C Nazca I Indian B African F South American G Australian H Antarctic D North American 23 Label C Transform A Divergent Daniel Couldn t Talk B Covergent 24 Label E Lithosphere C New crust formed here A Asthenosphere B Trench D Transform fault FBA 25 Label B Fringing reef A Atoll C Barrier reef 26 Which type of plate boundary is most closely associated with the formation of new ocean floor Divergent 27 Where would you expect to see alternating bands of rock with different magnetic polarities On both sides of the mid ocean ridge 28 Evidence for continental drift includes All the above 29 Fossils of ancient tropical plants are currently found near the poles because the Plants lived in the tropics but landmasses have drifted to current locations 30 Which of the following is the main reason that Earth has a magnetic field Convection in the liquid iron nickel outer core generates a magnetic field 31 Select all that apply Of the following statements about ocean crust which is are true Ocean crust is destroyed at deep sea trenches Ocean crust is created at the mid ocean ridge 32 The Mid Atlantic Ridge is an example of a Divergent plate boundary 33 Which of the following is characteristic of continental continental convergent plate boundaries Uplifted mountain ranges 34 The Hawaiian Islands are located where the Pacific plate is Moving over a hot spot or mantle plume 35 Volcanoes on the seafloor that are flat topped because of wave erosion are called Tablemounts 36 The method that is used most frequently to investigate sediment and rock layers of the sea floor is Sound waves specifically seismic reflecting profiling 37 Consider a continental margin that has a very broad flat continental shelf and a slope that descends 1 km to the deep ocean basin Based on this information this margin is Far from an oceanic ridge 38 Of the following statements about Earth s hypsographic curve figure shown below which is are true All except The hypsographic curve shows the amount of water in the 39 Passive continental margins are characterized by all the following except 40 All the following are considered part of the continental margin except the 41 Underwater avalanches of muddy water mixed with rocks and debris are oceans Deep sea trenches Fracture zone Turbidity currents 42 Select all that apply What process es affect the shape and structure of continental shelves All except the creation of pillow lavas along the mid ocean ridge 43 Extending from the base of the continental rises into the deep ocean basins are flat depositional surfaces called 44 Volcanic peaks on the deep ocean floor with conical tops are called Abyssal plains Seamounts Rift valley 45 Identify the major feature of a slow spreading mid ocean ridge 46 Nearly all oceanic islands are Volcanic in origin 47 Oceanic ridges and rises result from seafloor spreading along Divergent plate boundaries 48 The direction of motion along a seafloor transform fault is In the same direction as the plates are spreading 49 Precision depth recorder PDR Uses high frequency sound waves to measure ocean depth 50 Match the
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