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Name: ________________________ Class: ___________________ Date: __________ ID: A Chapter 12 Quiz Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement tr ue. ____ 1. Tectonic plates move apart at mid-ocean ridges. ____ 2. Subduction zones occur where continental plates subduct under oceanic plates. ____ 3. The epicentre of an earthquake is found on Earth’s surface directly above the focus. Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 4. What piece of evidence is the best clue to suggest Antarctica was once located closer to the equator than it is now? a. It’s shape looks as though it was once attached to Africa. b. Its average temperature is warmer in December than in July. c. Fossils of tropical plants have been found there. d. The large amount of biodiversity that exists on Antarctica. ____ 5. Which of the following was not used by Alfred Wegener for his theory of continental drift? a. fossil evidence c. patterns of earthquakes b. similar rock structures d. matching continental shapes ____ 6. Alternating magnetic stripes on either side of an ocean ridge are caused by: a. the fast cooling of magma that reaches the ocean bottom b. the thick layers of ocean sediment c. the cooling of magnetic magma d. the reversing polarity of Earth’s magnetic field ____ 7. Continents on lithospheric plates move around Earth’s surface due to convection currents in Earth’s: a. crust c. outer core b. mantle d. inner core 1 Name: ________________________ ID: A Use the following diagram depicting a cross-section through Earth’s surface to answer the next four questions. ____ 8. Which of Earth’s layers contains solid iron and nickel? a. R c. T b. S d. U ____ 9. Which of Earth’s layers cannot transmit S-waves? a. R c. T b. S d. U Use the following diagram to answer the next five questions. ____ 10. Which of the following plate boundaries is shown at Y in the diagram? a. a transform boundary c. a continental-oceanic boundary b. an oceanic-oceanic boundary d. a continental-continental boundary 2 Name: ________________________ ID: A ____ 11. Which of the following plate boundaries is shown at X in the diagram? a. a diverging oceanic-oceanic boundary b. a converging oceanic-oceanic boundary c. a diverging continental-oceanic boundary d. a converging continental-continental boundary ____ 12. Mt. St. Helens is part of the Cascade mountain range in Washington State. It is showing signs of renewed volcanic activity after being relatively quiet since its 1980 eruption. What is the probable reason for this renewed volcanic activity in Mt. St. Helens? a. The volcano erupts on a 30-year cycle. b. Earthquakes are causing magma to build up. c. The 1980 eruption did not release enough pressure. d. New molten material is coming up from a subducting plate. Use the following diagram to answer the next two questions. ____ 13. What type of plate boundary is shown in the diagram? a. a transform boundary c. a continental-oceanic boundary b. an oceanic-oceanic boundary d. a continental-continental boundary ____ 14. What types of geological features are associated with this type of plate boundary? a. earthquakes and volcanoes only b. mountains and volcanoes only c. mountains and earthquakes only d. earthquakes, mountains, and volcanoes 3 Name: ________________________ ID: A ____ 15. Why is it possible that British Columbia may experience a volcanic eruption within the next hundred years? a. Volcanoes occur close to oceans, and British Columbia borders an ocean. b. British Columbia is near a tectonic plate boundary. c. British Columbia is on very soft rock, which melts easily. d. British Columbia experiences earthquakes, and volcanoes are associated with earthquakes. ____ 16. Which of the following is the fastest seismic wave? a. P-wave c. L-wave b. S-wave d. surface wave Use the following diagram to answer the next three questions. ____ 17. Where is a trench located? a. W b. X c. d. Y Z ____ 18. What type of seismic wave has particle motion moving back and forth in the direction of wave travel? a. P-wave b. S-wave c. d. L-wave surface wave ____ 19. Which seismic waves travel only along the surface of Earth? a. P-waves c. L-waves b. S-waves d. body waves 4 Name: ________________________ ID: A ____ 20. Which diagram below shows the map symbol for a diverging plate boundary? a. b. diagram A diagram B c. d. diagram C diagram D Short Answer 21. Explain why volcanoes form at oceanic-continental plate boundaries but not at continental-continental plate boundaries. (2 marks) Problem 22. Explain how convection currents are created in Earth’s mantle and explain how they drive the motion of the tectonic plates. (2 marks) 5 ID: A Chapter 12 Quiz Answer Section MODIFIED TRUE/FALSE 1. ANS: LOC: MSC: 2. ANS: T D4-3 U F PTS: 1 TOP: Evidence for Continental Drift DIF: Average KEY: tectonic plates | ridges Subduction zones occur where oceanic plates subduct under continental plates. PTS: KEY: 3. ANS: LOC: MSC: 1 DIF: Average LOC: D4-3 subduction zones | plate boundaries T PTS: 1 D4-5 TOP: Features of Plate Tectonics K TOP: MSC: DIF: KEY: Features of Plate Tectonics U Average earthquake | epicentre | focus MULTIPLE CHOICE 4. ANS: TOP: MSC: 5. ANS: TOP: MSC: 6. ANS: TOP: MSC: 7. ANS: TOP: MSC: 8. ANS: TOP: MSC: 9. ANS: TOP: MSC: 10. ANS: TOP: MSC: 11. ANS: TOP: MSC: 12. ANS: TOP: C PTS: 1 Evidence for Continental Drift U C PTS: 1 Evidence for Continental Drift U D PTS: 1 Evidence for Continental Drift U B PTS: 1 Features of Plate Tectonics U D PTS: 1 Features of Plate Tectonics U C PTS: 1 Features of Plate Tectonics H C PTS: 1 Features of Plate Tectonics U A PTS: 1 Features of Plate Tectonics U D PTS: 1 Features of Plate Tectonics DIF: Difficult LOC: D5-2 KEY: continental drift theory DIF: Difficult LOC: D5-1 KEY: continental drift theory DIF: Difficult LOC: D5-2 KEY: magnetic striping DIF: Easy LOC: D4-2 KEY: mantle convection DIF: Easy LOC: D4-2 KEY: Earth’s layers DIF: Difficult LOC: D4-2 KEY: Earth’s layers | earthquake waves DIF: Average LOC: D4-3 KEY: plate boundaries DIF: Average LOC: D4-3 KEY: plate boundaries DIF: Difficult KEY: volcanoes 1 LOC: D4-5 MSC: U ID: A 13. ANS: TOP: MSC: 14. ANS: TOP: MSC: 15. ANS: TOP: MSC: 16. ANS: TOP: MSC: 17. ANS: TOP: 18. ANS: TOP: 19. ANS: TOP: 20. ANS: TOP: MSC: D PTS: 1 Features of Plate Tectonics U B PTS: 1 Features of Plate Tectonics U B PTS: 1 Features of Plate Tectonics H A PTS: 1 Features of Plate Tectonics K B PTS: 1 Features of Plate Tectonics A PTS: 1 Features of Plate Tectonics C PTS: 1 Features of Plate Tectonics A PTS: 1 Features of Plate Tectonics U DIF: Average LOC: D4-3 KEY: plate boundaries | convergence DIF: Difficult LOC: D4-3 KEY: plate boundaries | convergence DIF: Difficult LOC: D4-5 KEY: plate boundaries DIF: Easy LOC: D4-2 KEY: earthquakes | seismic waves DIF: KEY: DIF: KEY: DIF: KEY: DIF: KEY: Easy LOC: D4-1 trench MSC: U Average LOC: D4-2 earthquakes MSC: U Average LOC: D4-2 earthquakes MSC: U Average LOC: D4-4 plate boundaries | diverging | symbol SHORT ANSWER 21. ANS: At oceanic-continental plate boundaries the oceanic plate subducts and melts, forming material for volcanoes. PTS: 1 DIF: Average KEY: plate boundaries LOC: D4-3 MSC: U TOP: Features of Plate Tectonics PROBLEM 22. ANS: Convection currents occur in Earth’s mantle when rock material is heated by the decay of radioactive materials (isotopes). The rock material becomes less dense (i.e., magma), then expands and rises. As this material rises, cooler more dense material moves to take its place. When the rising material cools, it sinks, only to be reheated. The resulting circular motion is called a convection current. PTS: 2 DIF: Average KEY: mantle convection LOC: D4-6 MSC: U 2 TOP: Features of Plate Tectonics