GLY EXAM 1 QUESTIONS AND
CORRECT ANSWERS
How is the earth's magnetic field generated? - Answer- Generated by convection of iron
within the liquid outer core
What is meant by magnetic north and geographic (or true) north? - Answer- Geographic
"true" north and magnetic north are NOT the same, magnetic north wanders
What is magnetic inclination? - Answer- the angle between the magnetic field line &
surface of the earth
What is magnetic declination - Answer- angle between true north and magnetic north
What does our magnetosphere have to do with iron rich minerals? - Answer- -Many
igneous rocks, formed from cooling crystallizing lava/magma, have ferromagnetic
minerals - like magnetite - which are affected by magnetic fields as the rock crystallizes
What is curie point? C? F? - Answer- -The temperature at which ferromagnetic minerals
gain or lose magnetic properties, and "align" themselves with the earths magnetic field
is called the Curie Point (585 C, or 1085 F)
Have the poles ever switched? - Answer- yes
What do we mean by zebra stripes? - Answer- the pattern of north-south pole switches-
its repeated on either side of the mid ocean ridges
Where is my office? - Answer- Rm. 118 Deloach Hall
How many exams will there be? - Answer- 4 ( including final
When is our final exam? - Answer- May 2nd
What is the science of geology? - Answer- -Physical Geology:is the study of the earth,
or other planetary bodies, their composition, and the processes responsible for
producing them and the features still being built today
, -Historical Geology: is the study of the earth in the context of its geologic history, as
understood through fossils, rocks, sediments and relative and absolute radioisotopic
dates.
What are two ways we can look at geological concepts - Answer- -physically and
historically
What are some reasons we should study geology in the 1st place? - Answer- -1. To
gain an understanding about the evolution/formation of our planet and how that relates
to the origin of our universe, solar system and other planets!
2. Resources! Renewable and nonrenewable.
3. Hazards! (what makes hazards worse?)
What is a factor which can make all geologic hazards (earthquakes, floods, volcanic
eruptions, etc.), worse? - Answer- population*
What method allows us/helps us in understanding the earth and the processes that
have made it? - Answer- -the scientific method
What is falsification and which theory has been definitively proven? - Answer- -You can
prove wrong, or FALSIFY, your hypothesis - in which case you go back and form
another hypothesis. None?
Early observers noticed what difference between stars and planets? - Answer- -
"Retrograde" motion separates planets from stars
What is the difference between geo- and helio- centrism? - Answer- -GEOCENTRIC:
Heavenly bodies revolved about the Earth
HELIOCENTRIC: (sun-centered) universe
Who is credited for putting us on the path of geocentrism for quite some time? What
else is he known for? - Answer- -Ptolemy: Ptolemy was also the first man to use latitude
and longitude on a map of the "then" known world
When did heliocentrism become acceptable again? - Answer- -The "European"
renaissance occurred generally between the 14th to 16th centuries
What was it about "natural events" that changed during the heliocentrism time? -
Answer- "Natural laws governed natural events"
Who calculated that the earth was created on 4004 BC and how? - Answer- James
Ussher
What is catastrophism? - Answer- a way to help explain the geologic features we saw -
and keep the earth only several thousand years old
CORRECT ANSWERS
How is the earth's magnetic field generated? - Answer- Generated by convection of iron
within the liquid outer core
What is meant by magnetic north and geographic (or true) north? - Answer- Geographic
"true" north and magnetic north are NOT the same, magnetic north wanders
What is magnetic inclination? - Answer- the angle between the magnetic field line &
surface of the earth
What is magnetic declination - Answer- angle between true north and magnetic north
What does our magnetosphere have to do with iron rich minerals? - Answer- -Many
igneous rocks, formed from cooling crystallizing lava/magma, have ferromagnetic
minerals - like magnetite - which are affected by magnetic fields as the rock crystallizes
What is curie point? C? F? - Answer- -The temperature at which ferromagnetic minerals
gain or lose magnetic properties, and "align" themselves with the earths magnetic field
is called the Curie Point (585 C, or 1085 F)
Have the poles ever switched? - Answer- yes
What do we mean by zebra stripes? - Answer- the pattern of north-south pole switches-
its repeated on either side of the mid ocean ridges
Where is my office? - Answer- Rm. 118 Deloach Hall
How many exams will there be? - Answer- 4 ( including final
When is our final exam? - Answer- May 2nd
What is the science of geology? - Answer- -Physical Geology:is the study of the earth,
or other planetary bodies, their composition, and the processes responsible for
producing them and the features still being built today
, -Historical Geology: is the study of the earth in the context of its geologic history, as
understood through fossils, rocks, sediments and relative and absolute radioisotopic
dates.
What are two ways we can look at geological concepts - Answer- -physically and
historically
What are some reasons we should study geology in the 1st place? - Answer- -1. To
gain an understanding about the evolution/formation of our planet and how that relates
to the origin of our universe, solar system and other planets!
2. Resources! Renewable and nonrenewable.
3. Hazards! (what makes hazards worse?)
What is a factor which can make all geologic hazards (earthquakes, floods, volcanic
eruptions, etc.), worse? - Answer- population*
What method allows us/helps us in understanding the earth and the processes that
have made it? - Answer- -the scientific method
What is falsification and which theory has been definitively proven? - Answer- -You can
prove wrong, or FALSIFY, your hypothesis - in which case you go back and form
another hypothesis. None?
Early observers noticed what difference between stars and planets? - Answer- -
"Retrograde" motion separates planets from stars
What is the difference between geo- and helio- centrism? - Answer- -GEOCENTRIC:
Heavenly bodies revolved about the Earth
HELIOCENTRIC: (sun-centered) universe
Who is credited for putting us on the path of geocentrism for quite some time? What
else is he known for? - Answer- -Ptolemy: Ptolemy was also the first man to use latitude
and longitude on a map of the "then" known world
When did heliocentrism become acceptable again? - Answer- -The "European"
renaissance occurred generally between the 14th to 16th centuries
What was it about "natural events" that changed during the heliocentrism time? -
Answer- "Natural laws governed natural events"
Who calculated that the earth was created on 4004 BC and how? - Answer- James
Ussher
What is catastrophism? - Answer- a way to help explain the geologic features we saw -
and keep the earth only several thousand years old
