SC300 UNIT3 EXAM/ SC300 UNIT3 EXAM (25/25)

1. The theory of continental drift was first proposed by (Points : 3)

Francis Bacon

Charles Richter

Alfred Wegener

Isaac Newton

Albert Einstein

2. The theory of continental drift has undergone significant changes due to advances in technology and subsequent since it was first posed in

500 B.C.





3. Which of the following forms of evidence was used to formulate Wegener’s theory of Continental Drift?

1. the jigsaw-like pattern of continental coastlines

2. magnetism of the ocean basin rocks

3. discovery of the Mid-Atlantic Ridge

4. radiometric dating of the basaltic rocks

4. What form of technology first allowed researchers to confirm that the Mid-Atlantic Ridge exists? 


topographic maps of the ocean floor


remote sensing via satellite

5. Earthquakes are known to occur at the following type of tectonic plate boundary




all of the above

 6. The scale for measuring the intensity of earthquakes was invented by

Francis Bacon

Charles Richter

Alfred Wegener

Isaac Newton

Albert Einstein

7. _____ waves cannot pass through ____ substances. Mapping the locations where these and other waves transmitted following an earthquake allows for the determining the layers of the _____, as well as the epicenter of an earthquake.

Compressional / solid / earth

Shear / liquid / earth

Compressional / solid / atmosphere

 Shear / liquid / atmosphere

8. The following field of science studies the waves of movement in the crust of the Earth:



plate tectonics



9. A seismic wave in which the molecules in the rock move back and forth in the same direction as the wave is called






10. Which piece of evidence was not used to support of the theory of plate tectonics?

 ages of rocks

 magnetic properties of ocean floor materials

ocean floor topography

measurements from radio astronomy


 11. Through the use of topographic mapping of the ocean floor, deep fissures in the ocean bottom can be located. These fissures are called

fault lines


the oceanic deep

a convergent zone

a divergent zone

12. Seismographs can measure the movement that emanates from an earthquake. This movement is called a

quake wave

seismic wave

fault wave

 tectonic wave

magma wave

13. The study of paleomagnetism and the reversals of rocks supports



 continental drift



14. Which of the following show the order of technological developments related to studying seismology and plate tectonics?

Seismographs, Topographic maps of the ocean floor, Paleomagnetism, Radio Astronomy, Seismic Tomography

Radio Astronomy, Paleomagnetism, Topographic maps of the ocean floor,

Seismic Tomography, Seismographs

Seismographs, Paleomagnetism, Seismic Tomography, Topographic maps of the ocean floor, Radio Astronomy

Topographic maps of the ocean floor, Seismic Tomography, Paleomagnetism, Radio Astronomy, Seismographs

15. Which of the following was used as evidence for plate tectonics?

topographic profiles of the ocean floors

 maps on rock magnetism

 data classifying rocks by age

sea floor spreading

all of these are correct

16. Which of the following correctly describes earthquakes?

Earthquakes are an abrupt release of energy

Prediction of earthquakes is an established science, which gives global citizens a chance to evacuate ahead of time.

Earthquakes have never occurred in the middle of the USA

No earthquake has been measured higher than 7 on the Richter scale

 All earthquakes happen within one kilometer of the Earth’s surface

17. What evidence convinced most scientists to accept the theory of plate tectonics?

ocean topography

magnetism of the ocean basin rocks

discovery of the Mid-Atlantic Ridge

radiometric dating of the basaltic rocks

all of these are correct

18. What causes the ‘Ring of Fire,’ which borders much of the Pacific Ocean?

plate subduction

divergent plates

sea-floor spreading

transform plate motion

all of these are correct

19. Which of these waves is classified as a type of seismic wave following earthquakes?




 shear waves

all of these are correct

20. What is the force that moves continents and tectonic plates?

 convection cells

mantle convection

radioactive decay

heat energy left from the great bombardment

 all of these are correct

22. Divergent plate boundaries are associated with

seafloor spreading

formation of new crust

volcanic action

shallow, low-energy earthquakes

all of these are correct

23. Which of the following is an example of a continental convergent plate boundary?

the East African Rift Valley

the San Andreas Fault

the Atlantic east coast fall line

Mount St. Helens in the northwest United States

 the Himalayan Mountains

23. The only currently active plate boundary within the continental United States is the

Marianas Trench

East-Pacific Rise

New Madrid Fault

 San Andreas Fault

Mid-Atlantic Ridge

24. The transform plate boundaries

form new material at rates exceeding that of the divergent plate boundaries

are the location of island arcs and hot spots

created the Andes Mountains in South America

are exemplified by the San Andreas fault

are sites of major volcano ranges

25. The magnetic patterns from seafloor data

were created by magnetite in lava flows

are caused by hot spots

are indicators of past and future earthquake sites

have no one explanation accepted by scientists

 always run perpendicular to the equator

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