Notice

If you get a question wrong, you can still click on the other answers. This will open up hints and explanations (if available), which will provide additional information.

Disclaimer: While every reasonable effort is made to ensure that the information provided is accurate, no guarantees for the currency or accuracy of information are made. It takes several proof readings and rewrites to bring the quiz to an exceptional level. If you find an error, please contact me as soon as possible. Please indicate the question ID-Number or description because server may randomize the questions and answers.

Go to: Midterm II | Final Exam

Geochemistry (GLGY 323-UCAL) Midterm I

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Some questions have hints and explanations. Click Start to begin.

Start

Congratulations - you have completed Geochemistry (GLGY 323-UCAL) Midterm I.

You scored %%SCORE%% out of %%TOTAL%%. With incorrect multiple attempts your score is %%PERCENTAGE%%

Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

The infamous mass deficiency of atoms is attributed to which of the following? (ID-GCM1-08)

A	Differences in spin ratios of sub-atomic particles.
B	Energy loss.
C	Depletion of matter.
D	Atomic decay.

Question 2

Lherzolite has the following mineral composition. (ID-GCM1-03)

A	Clinopyroxene and Quartz
B	Orthopyroxene, Olivine and Quartz
C	Orthopyroxene and Olivine
D	Orthopyroxene, Clinopyroxene and Olivine
E	Orthopyroxene, Clinopyroxene and Quartz

Question 3

A higher equilibrium constant, k indicates ________. (ID-GCM1-23)

A	the net reaction will result in grain of energy; change in enthalpy.
B	the net reaction will result in release of energy; change in enthalpy.
C	the equilibrium for the chemical reaction lies with the reactants
D	the equilibrium for the chemical reaction lies with the products

Question 4

Referring to ionic radii, higher the ______ and smaller the ______. Answer is in respective order. (ID-GCM1-12)

A	charge , atomic number
B	charge , cation
C	atomic number , charge
D	radius , cation
E	atomic number , size of the atom

Question 5

The enthalpy of exothermic reactions will have which of the following characteristics? (ID-GCM1-18)

A	Increased of net internal energy.
B	High amount of internal energy in the products.
C	A positive change enthapy
D	A negative change enthapy.

Question 6

What is the primary process/force that resulted in the formation of Earth's solid core? (ID-GCM1-05)

A	Density variation between the silicon core and the magma ocean above.
B	Change in temperature in the magma chamber.
C	Separation of metals from silicates.
D	Magnetic force.
E	Centrifugal force caused by the rotation of the Earth.

Question 7

XRF, INAA and ICP-AES can be used for analyzing... (ID-GCM1-16)

A	trace elements.
B	major and minor elements.
C	Elements lighter than Na.
D	isotopes.

Question 8

What is geochronology? (ID-GCM1-02)

A	Dating of rocks, fossils and sediments based on radiometric dating, paleomagnetic references and other techniques.
B	Construction of the history of rocks, fossils and sediments based on relative depositional sequences.
C	Dating of rocks, fossils and sediments based on chronological sequence of sedimentation and lithification.
D	Construction of the history of rocks exclusively based on Pb-207/U-235 dating technique.
E	None of the listed answers are correct.

Question 9

Elements with ____________ are e-donors. (ID-GCM1-28)

A	high electronegativity
B	large atomic numbers
C	low electronegativity
D	small atomic numbers
E	covalent bonds

Question 10

According to the Aufbau Principle, maximum number of electrons that can occupy an orbital is ______ and the electrons enter the orbitals ______. Answer is in respective order. (ID-GCM1-09)

A	one , at an angle
B	two , with lowest energy
C	six , at an angle
D	one , with lowest energy
E	three , at an angle

Question 11

Which of the following statement is true on coordination number (CN)? (ID-GCM1-27)

A	Ionic radii decreases with increasing CN.
B	Larger cations have a higher CN.
C	Electrostatic valency is directly proportional to CN.
D	CN is a measure of number of electrons surrounding a nucleus.

Question 12

Decompression melting is associated with which of the following? (ID-GCM1-06)

A	Strike-slip earthquakes.
B	Subduction zones.
C	Convergent boundaries.
D	Oceanic crust formation.
E	Liquefaction.

Question 13

What are lithophile elements? (ID-GCM1-24)

A	Elements that preferentially partition into silicate phase.
B	Elements that preferentially partition into gas phase.
C	Elements that preferentially partition into metallic phase.
D	Elements that preferentially partition into sulfur bearing phase.

Question 14

What the primary purpose of the large magnetic field used in modern mass spectrometers? (ID-GCM1-13)

A	Separation of isotopes based on the mass.
B	Acceleration of the ions through the analyzing chamber.
C	Detection of different types of isotopes.
D	Source for the ionic mass.

Question 15

Ionic substitution becomes more probable under which of the following conditions? (ID-GCM1-11)

A	Low temperature and low pressure
B	Low temperature and high pressure
C	High temperature and low pressure
D	None of the answers are correct
E	High temperature and high pressure

Question 16

Which of the following statement best describe: IAP<Ksp --> <1 --> SI is negative (ID-GCM1-22)

A	Mineral dissolves
B	Mineral precipitates
C	Solution is supersaturated
D	Chemical state is at equilibrium
E	Not enough information is provided to answer this question.

Question 17

What is the composition of the Earth's crust? (ID-GCM1-04)

A	Ultramafic
B	Rich in high density rocks and minerals
C	Mafic to ultramafic
D	Mafic to felsic
E	Silicon poor

Question 18

What are siderophile elements? (ID-GCM1-26)

A	Elements that preferentially partition into silicate phase.
B	Elements that preferentially partition into sulfur bearing phase.
C	Elements that preferentially partition into metallic phase.
D	Elements that preferentially partition into gas phase.

Question 19

What analytical method is best described by the following descriptors? (ID-GCM1-19)
-Solid samples must be prepared by making them into a finely grounded rock powder pressed into pellets.
-Low detection limits (can measure trace elements)
-Rapid and precise analytical technique.
-Elements lighter than Na cannot be analyzed.

A	Atomic Absorption Spectrophotometry (AAS)
B	Instrumental Neutron Activation Analysis (INAA)
C	X-ray Florescence (XRF)
D	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
E	Electron Microprobe Analysis (EPMA)

Question 20

How do we know the core of the Earth is composed of primarily Fe? (ID-GCM1-07)

A	Unique seismic signature associated with high density materials.
B	Based on the chemical composition of rocks on the surface.
C	From the samples from kimberlite pipes.
D	By analyzing the sample taken from the core.
E	By analyzing the magma composition from different volcanoes.

Question 20 Explanation:

During major earthquakes, the seismic signals can be measured at different parts of the world. By analyzing seismic signals, from these earthquakes signals that traveled across the core of the Earth, we can conclude the core is most likely rich in Fe.

Question 21

Which of the following describes the size (volume) of the orbital? (ID-GCM1-10)

A	Principle Quantum Number
B	Azimuthal Quantum Number
C	Spin Quantum Number
D	Magnetic Quantum Number

Question 22

In this particular type of mass spectrometry, the sample solution is sprayed into a high temperature plasma produced by electromagnetic induction. (ID-GCM1-15)

A	JMS
B	SIMS
C	XRF-MS
D	TIMS
E	ICP-MS

Question 23

Diamonds are associated with which of the following geological environment? (ID-GCM1-21)

A	Subduction zones
B	Hydrothermal mineral deposits
C	Ore deposits
D	Archean cratons
E	Mantel

Question 24

Which of the following statement is true about the Atomic Absorption Spectrophotometry (AAS)? (ID-GCM1-20)

A	Similar to XRF, except the sample is excited by a beam of electrons.
B	Sample must be in solution.
C	Several elements can be analyzed at a time.
D	ASS is a non-destructive analytical method.
E	Samples must be vacuum chamber compatible.

Question 25

A state of a system is defined by the ____ and the change in state in result in ____. (ID-GCM1-17)

A	amount of energy , change in internal energy
B	amount of heat it contains , decreasing internal energy
C	external factors , change in internal energy
D	stability of atoms , increasing in internal energy
E	None of the answers are correct.

Question 26

What are chalcophile elements? (ID-GCM1-25)

A	Elements that preferentially partition into silicate phase.
B	Elements that preferentially partition into metallic phase.
C	Elements that preferentially partition into sulfur bearing phase.
D	Elements that preferentially partition into gas phase.

Question 27

Which of the following is considered as an advantage of using Thermal Ionization Mass Spectrometry (TIMS)? (ID-GCM1-14)

A	Ability to ionize and evaporate samples at different temperatures at the same time.
B	Ability to obtain comprehensive analytical data within a very short time period.
C	Can used to ionize almost any element in nature.
D	No sample preparation is required for analysis.
E	Very high spatial resolution.

Question 28

What is the difference between isotopes and isobars? (ID-GCM1-01)

A	Isotopes are unstable states of chemical elements while isobars are regions where these unstable elements are found.
B	Isotopes have the same atomic mass but different atomic number, while isobars have the same atomic number but different atomic mass.
C	An isobar is a particular nuclide of an element that has a specific number of neutrons, and thus, a specific mass. An isotope refers to all of the nuclides of all elements that have a particular atomic mass.
D	Isotopes have the same atomic number but different atomic mass, while isobars have the same atomic mass, but different atomic number.
E	Isobars are atoms of the same element in different state or configuration while isotopes are completely different elements that share several common atomic properties.

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 28 questions to complete.

←

List

→

Return

Shaded items are complete.

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	End

Return

Credits: Based on the excellent class notes provided by, Dr. Rajeev Nair during Winter 2017 and textbook ISBN-978-1-444-35095-1.
FAQ | Report an Error

Sanuja Senanayake

Geology 323-University of Calgary

Go to: Midterm II | Final Exam

Geochemistry (GLGY 323-UCAL) Midterm I

Standing on the shoulders of giants

Go to: Midterm II | Final Exam

Geochemistry (GLGY 323-UCAL) Midterm I

Print/Share:

Standing on the shoulders of giants