Name ______________________		GSC 120    
 4/11/05    
 Third Exam

I.	True or False (1 point each). Indicate whether the statement is (A) True or (B) False.

1. 	The pictures at the //terraserver.microsoft.com website were taken from airplanes.

2.	The label “C.I. = 100'” means that adjacent contour lines differ by one hundred feet in elevation.

3. 	In the activity with peanut butter and jelly we demonstrated folding and faulting.

4. 	Core sample taken from the sandwich with the plastic straw indicated the presence of anticlines but not synclines.

5. 	A composite volcano is formed from andesitic lavas.

6. 	A shield volcano is formed from lava that flows readily?

7. 	Deposition occurs where rivers speeds up. 

8. 	The Grand Canyon, gouged out by the Colorado River is like an open book spanning two million years of geologic history.

9. 	When subjected to stress, rocks at great depths and high temperature tend to break.

10. 	Sedimentary rocks are formed from particles or dissolved materials from older rock.

11. 	When water evaporates hundreds of calories of heat per gram of water are given off by the water.

12. 	A miniature cloud formed in the bottle when the pressure decrease suddenly.

13. 	A hurricane cannot form near the equator between 5oS and 5oN.

14. 	The western slopes of mountains in the western USA are moist and forested, whereas the eastern slopes are dry and have grassland or desert vegetation.

15. 	People living on the 66½oN parallel of latitude experience 24 hours of darkness during the winter solstice.

II.	Multiple Choice (1 point each). Indicate which is the best response.

16. 	Rough coordinates for our area of the country are ____ ____.
A. 40oS 80oW		B. 40oS 80oE
	C. 40oN 80oW		D. 40oN 80oE
	E. <None of the above.>

17. 	The word “volcano” is from the ______ language.
A. Hebrew		B. Hawaiian
	C. Greek		D. Italian
	E. <None of the above.>

18. 	In the Milky Way Tectonics activity the _______ represented the Earth’s crust, the _______ represented the upper mantle, and the _______ represented the lower mantle.
A. chocolate	caramel		nougat
B. chocolate	nougat		caramel
	C. caramel	chocolate		nougat	
D. caramel	nougat		chocolate
	E. nougat 	chocolate		caramel	

19. 	In the Mexico City earthquake of 1985 most buildings _____________ stories high were destroyed
A. over 12	B. 10 - 14
	C. 4 - 10		D. under 10
	E. <None of the above.>

20.	Oceanic crust is ________________ than continental crust.
A. thicker and denser		B. thicker and less dense	
C. thinner and denser		D. thinner and less dense
E. <It all depends.>

21. 	The Richter scale is a(n) ___________ scale.
A. exponential		B. spring
	C. logarithmic		D. sliding
	E. <None of the above.>

22. 	The “Ring of Fire” marks __________________.
A. a high concentration of earthquakes	
B. a high concentration of volcanoes
	C. the boundaries of the Pacific Ocean
D. <All of the above.>
	E. <None of the above.>

23. 	The gases that build up underneath a volcano are made up of
A. steam		B. carbon dioxide
	C. sulfur		D. nitrogen
	E. <All of the above.>

24. 	Which of the following does not describe the geology of Iceland?
	A. frequent small shallow earthquakes
	B. tensional cracks called rifts
	C. geysers and hot springs
	D. fissures and volcanic craters
	E. <None of the above.>

25. 	Continental crust is too __________ to subduct.
	A. buoyant		B. dense
	C. basaltic		D. young
	E. <None of the above.>

26. 	Coal forms from the remains of _________ that __________. 	
	A. small animals 	that died in ancient swamps
	B. sediment		that was deposited under heat
	C. peat			that stayed waterlogged for eons
	D. plants			that fell in shallow water and did not rot
	E. <None of the above.>

27. 	What is the name given to the force which tends to pull rocks apart?
	a.  compressive stress	b.  tensional stress
	c.  shear stress		d.  coriolis
	e. <None of the above.>

28. 	An arch-shaped fold resulting from plastic deformation is called
	a.  an anticline.		b.  a syncline.
	c.  a plunging fold.	d.  an isoclinal fold.
	e. <None of the above.>

29. 	The most common rock type in the earth's crust is
	a.  igneous.		b.  sedimentary.
	c.  metamorphic.	d.  sandstone.
	e. <None of the above.>

30. 	The most common rock type at the surface of the earth is
	a.  igneous.		b.  sedimentary.
	c.  metamorphic.	d.  sandstone.
	e. <None of the above.>

31. 	According to the plate tectonics theory, sea-floor spreading occurs at a
	a.  subduction zone.	b.  convergent boundary.
	c.  divergent boundary.	d.  transform boundary.
	e. <None of the above.>

32. 	___ waves are slower than ___ waves.
	A. P-   S-				B. S-   P-
	C. longitudinal transverse	D. compression shear
	e. <None of the above.>

33. 	The Himalayan Mountains were formed as a result of 
	a. ocean-continent plate divergence.
	b. ocean-continent plate convergence.
	c. continent-continent plate convergence.
	d. the deformation that occurred along a transform boundary.
	e. <None of the above.>

34. 	The tsunami of December 26, 2004 was caused by ______________. 
A. an earthquake of magnitude 7.0
	B. an earthquake of magnitude 8.0
	C. an underwater volcano
D. fierce winds and ocean currents
	E. <None of the above.>

35. 	In an occluded front _______________.
A. 	cold air overtakes warm air
	B. 	warm air overtakes the cold air
	C. 	cold air and warm air stay in one place
	D. 	cold air overtakes warm air and collides with cold air ahead of it 
	E. 	<None of the above.>

36. 	Most of the world’s largest deserts occur at latitudes around _____ south or north.
	A. 15o	B. 30o  	C. 45o	D. 60o

37. 	When water vapor in the atmosphere condenses to liquid water,
	a. dew falls to the ground.	b. it rains or snows
	c. a cloud forms.			d. <Any of these may be correct.>

38. 	Which cloud type is usually associated with the arrival of a cold front?
	a. high, thin cirrus		b. fog
	c. low stratus				d. towering cumulus
	e. <All of the above.>

39. 	The evaporation of water can be enhanced _______________.
A. with wind			B. with heat
	C. by exposing more of the water’s surface to the air
D. with the addition of a little alcohol
	E. <All of the above.>

40. 	Nearly 1400 watts/meter2 of solar energy reaches the outermost atmosphere.  What fraction of this energy on average actually reaches the earth's surface? About
	a.  20%		b.  33%		c.  50%		d.  67%

41. 	Longer periods of drizzle, rain or snow are usually associated with which cloud type?
	a.  stratus	b.  cumulus
	c.  cirrus	d.  <None of the above.>

42. 	The wind chill factor
	a. 	measures the effect of low temperature and wind on humans.
	b. 	increases as the wind speed increases.
	c. 	is the temperature at which water vapor begins to condense.
	d. 	is the product of the temperature (in ̊C) and the relative humidity.
	E. 	<None of the above.>