GEOLOGY 1010 EXAM 1 QUESTIONS
AND ANSWERS ALL CORRECT
Which is a correct comparison of oceanic and continental crust? - Answer- Continental
crust is thicker, lower density, and higher in silica (i.e. "felsic") compared to oceanic
crust.
A scientific theory is - Answer- among other things, well substantiated and has been
thoroughly tested.
The deepest portions of earth's oceans are found - Answer- in subduction zone
trenches
Polar wandering refers to the ________ movement of the ancient magnetic poles, at the
time a particular rock forms and retains the prevailing magnetic field. - Answer-
apparent
Probably the biggest problem with Wegener's theory of continental drift was that -
Answer- his mechanism was not consistent with what geologists understood about the
strength of rocks.
Ophiolites provide a means to examine ancient - Answer- oceanic lithosphere
The earth, other planets, and the sun all formed at about the same time. Evidence
(primarily from meteorites and lunar samples) suggests that this was ________ years
ago. - Answer- 4.5 million
The lithosphere is all of the following except - Answer- a zone that includes deep parts
of the mantle.
S-waves - Answer- cannot pass through liquids
Magnetic reversals - Answer- occur irregularly, but on average, about every 500,000yrs
Earth's core is primarily made of - Answer- iron and nickel
Elastic rebound theory can be described as a model for - Answer- how rocks eventually
break (rupture) when sufficient stress is applied.
The first seismic waves to arrive at a seismic station are - Answer- P waves
AND ANSWERS ALL CORRECT
Which is a correct comparison of oceanic and continental crust? - Answer- Continental
crust is thicker, lower density, and higher in silica (i.e. "felsic") compared to oceanic
crust.
A scientific theory is - Answer- among other things, well substantiated and has been
thoroughly tested.
The deepest portions of earth's oceans are found - Answer- in subduction zone
trenches
Polar wandering refers to the ________ movement of the ancient magnetic poles, at the
time a particular rock forms and retains the prevailing magnetic field. - Answer-
apparent
Probably the biggest problem with Wegener's theory of continental drift was that -
Answer- his mechanism was not consistent with what geologists understood about the
strength of rocks.
Ophiolites provide a means to examine ancient - Answer- oceanic lithosphere
The earth, other planets, and the sun all formed at about the same time. Evidence
(primarily from meteorites and lunar samples) suggests that this was ________ years
ago. - Answer- 4.5 million
The lithosphere is all of the following except - Answer- a zone that includes deep parts
of the mantle.
S-waves - Answer- cannot pass through liquids
Magnetic reversals - Answer- occur irregularly, but on average, about every 500,000yrs
Earth's core is primarily made of - Answer- iron and nickel
Elastic rebound theory can be described as a model for - Answer- how rocks eventually
break (rupture) when sufficient stress is applied.
The first seismic waves to arrive at a seismic station are - Answer- P waves
