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1. Which observation supported Wegener’s theory of continental drift?    Different continents had different rock types.

  Identical fossils were found on continents that were far apart.

  Each continent had mountain ranges.

  The earth’s rotation could provide enough force to move the continents apart.

Question 2.2. Which feature do you usually see when tectonic plates move apart?   mountains

  new ocean ridges and seafloor 

  volcanoes 

  earthquakes

Question 3.3. What happens in a convection cell?   Hot, less dense material moves horizontally, while cold, dense material moves vertically.

  Cold, dense material moves horizontally, while hot, less dense material moves vertically.

  Hot, less dense material sinks while cold, dense material rises.

  Cold, dense material sinks while hot, less dense material rises. 

Question 4.4. Which materials can P waves travel through?   solids, liquids, and gases

  solids

  liquids

  gases

Which of the following types of volcanoes has steep sideswith a broad, gently sloping base? (Points : 3)

  shield-volcano

  composite-conevolcano

  cinder-conevolcano

  hot-spotvolcano

Question 8.8. What type of material is released from avolcano? (Points : 3)

  lava

  gases

  pyroclasticmaterial, lava, and gases

  pyroclasticmaterial

Question 9.9. What term is used when describing characteristicsof magma flow?  (Points : 3)

  viscosity

  temperature

  silica content

  composition

Question 10.10. Which of the following may be associatedwith the collision of two sections of continental crust? (Points : 3)

  earthquakes anda mountain range 

  earthquakes,volcanoes, and trenches

  hot-spotvolcanoes

  trenches andearthquakes

Question 11.11. The S-P interval of seismic waves recordedat a seismometer is 8 minutes. Approximately how far away is the earthquake’sepicenter from the seismometer? [equation: (S-P interval) = 0.00146 (distanceto epicenter)]

  less than 1 km

  550 km

  5,500 km

  8 km

Question 12.12. Deposits of economic minerals might beassociated with which of the following?

  two sections ofcontinental crust moving together

  two tectonicplates moving past each other

  two tectonicplates moving apart

  an oceanicplate and a continental plate moving together

Which of the following features was not created by subduction? (Points : 3)  Alps

  Andes

  Mariana Trench

  Japan

Question 20.20. The seismic waves of an earthquake are useful in determining which of the following? (Points : 3)  distance to a plate boundary

  distance to the ocean

  time of an earthquake

  interior of the earth

Question 21.21.

A seismograph station is located 2000 km from an earthquake’s epicenter. Explain the order that the S and P waves will arrive at the station. Using what you know about the characteristics of the different waves, explain your answer.