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Fill in the Blank


This activity contains 10 questions.

Question 1
1 Vertical movements of the Earth's crust related to the buoyancy of Earth materials are explained by the principle of __________.
 
uniformitarianism
isostacy
magnetic reversal
lithification
catastrophism
End of Question 1


Question 2
2
Open Hint for Question 2 in a new window		 Lithosphere is comprised of Earth's _____________.
 
crust and inner core
outer core and inner mantle
crust and uppermost mantle
core and mantle
asthenosphere and lower mantle
End of Question 2


Question 3
3
Open Hint for Question 3 in a new window		 From the surface down to the core, the density of Earth materials _________ .
 
increases continuously
increases, then abruptly decreases
shows no measurable pattern of increase or decrease
decreases continuously
decreases, then abruptly increases
End of Question 3


Question 4
4
Open Hint for Question 4 in a new window		 Earth's age is estimated by scientists to be ________ years.
 
6,400,000,000,000
4,600,000,000
6,400,000,000
6,400,000
4,600,000
End of Question 4


Question 5
5
Open Hint for Question 5 in a new window		 We are currently living in the _____________ period of the _____________ era.
 
cambrian / paleozoic
quaternary / cenozoic
phanerozoic / eocene
jurassic / mesozoic
tertiary / proterozoic
End of Question 5


Question 6
6
Open Hint for Question 6 in a new window		 ____________ is the primary scientific method used to determine absolute ages for crustal rock that is millions or billions of years old.
 
cenozoic profiling
cryogenic activation
seismic tomography
relative positioning
radiometric dating
End of Question 6


Question 7
7
Open Hint for Question 7 in a new window		 Some of the most common intrusive igneous rocks, listed in order from ultra-mafic to felsic, include ________________.
 
Peridotite, Gabbro, Diorite, and Granite
Quartz, Feldspar, Mica, and Amphibole
Rhyolite, Dacite, Andesite, and Basalt
Basalt, Andesite, Dacite, and Rhyolite
Granite, Diorite, Gabbro, and Peridotite
End of Question 7


Question 8
8
Open Hint for Question 8 in a new window		 Conglomerate, Sandstone, Siltstone, and Shale are _________ rocks which are primarily distinguished by differences in __________.
 
extrusive igneous / cooling rates
chemical sedimentary / mineralogy
evaporite / salt content
metamorphic / parent rock
clastic sedimentary / grain size
End of Question 8


Question 9
9
Open Hint for Question 9 in a new window		 Lithospheric plates move at roughly __________, with some slightly faster and some slightly slower.
 
20 meters per hour
5 centimeters per year
1 millimeter per hour
1 centimeter per day
1 kilometer per minute
End of Question 9


Question 10
10 The world's deep ocean trenches coincide with _________.
 
subduction zones
sea floor spreading zones
transform plate boundaries
continental rift zones
mid-ocean ridges
End of Question 10






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