Geography and Earth Sciences

How did researchers in the mid-20th century obtain ocean floor samples in order

How did researchers in the mid-20th century obtain ocean floor samples in order

How did researchers in the mid-20th century obtain ocean floor samples in order to determine the age of the seafloor?
A) Satellite imagine
B) Manned submersibles
C) Hydraulic vacuum tubes
D) Drilling ships

barry   2493   2 Replies

barry

What two pieces of information would researchers need to have in order to calcul

What two pieces of information would researchers need to have in order to calcul

What two pieces of information would researchers need to have in order to calculate the rate of plate motion for seafloor spreading?
A) Age of the continent and depth of the water
B) Distance from the rift and age of seafloor sample
C)

barry   1411   2 Replies

barry

What generates the heat necessary for convection in the Earth?

What generates the heat necessary for convection in the Earth?

What generates the heat necessary for convection in the Earth?
A) Volcanic Eruption
B) Friction between moving slabs
C) Chemical reactions between geologic materials and hydrothermal fluids
D) Decay of radioactive materials

barry   2325   2 Replies

barry

________ is when cold oceanic lithosphere are more dense than the underlying war

________ is when cold oceanic lithosphere are more dense than the underlying war

________ is when cold oceanic lithosphere are more dense than the underlying warm lithosphere.
A) Slab Pull
B) Slab Push
C) Ridge Push
D) Mantle Drag

barry   1332   2 Replies

barry

Along which tectonic boundary is ridge push going to be most important?

Along which tectonic boundary is ridge push going to be most important?

Along which tectonic boundary is ridge push going to be most important?
A) Convergent Boundary
B) Divergent Boundary
C) Transform Boundary

barry   1631   2 Replies

barry

In which layer of the Earth does the convection necessary for plate motion occur

In which layer of the Earth does the convection necessary for plate motion occur

In which layer of the Earth does the convection necessary for plate motion occur?
A) Crust
B) Mantle
C) Outer Core
D) Inner Core

barry   1935   2 Replies

barry

Which model of convection describes how the interior is divided into several lev

Which model of convection describes how the interior is divided into several lev

Which model of convection describes how the interior is divided into several levels of convection cells?
A) Layer Cake Model
B) Whole-Mantle Convection
C) Plume Model
D) Differentiation Model

barry   862   2 Replies

barry

Which factor contributes the most toward plate motion?

Which factor contributes the most toward plate motion?

Which factor contributes the most toward plate motion?
A) Ridge Push
B) Mantle Drag
C) Slab Pull
D) Friction

barry   2282   2 Replies

barry

In the Whole-Mantle Convection model, what feature balances the deeply descendin

In the Whole-Mantle Convection model, what feature balances the deeply descendin

In the Whole-Mantle Convection model, what feature balances the deeply descending lithosphere by transporting hot material toward the surface?
A) Kimberlites
B) Decompression Melting
C) Mantle Plumes
D) Rift Zones

barry   1462   2 Replies

barry

What are the two groups of feldspar minerals called?

What are the two groups of feldspar minerals called?

What are the two groups of feldspar minerals called?
A) Microcline and Orthoclase
B) Potassium Feldspar and Plagioclase
C) Sodium and Calcium
D) Albite and Anorthite

barry   639   2 Replies

barry

What is the mineral name for table salt?

What is the mineral name for table salt?

What is the mineral name for table salt?
A) Halite
B) Calcite
C) Dolomite
D) Gypsum

barry   1909   2 Replies

barry

Where are the majority of transform faults located?

Where are the majority of transform faults located?

Where are the majority of transform faults located?
A) Southern California
B) On the ocean floor offsetting segments of oceanic ridge
C) Radiating from convergent boundaries as stress fractures
D) Along mountain ranges that have b

barry   734   2 Replies

barry

Which type of convergence will result in a volcanic island arc?

Which type of convergence will result in a volcanic island arc?

Which type of convergence will result in a volcanic island arc?
A) Oceanic-Continental
B) Oceanic-Oceanic
C) Continental-Continental

barry   1631   2 Replies

barry

Which ferromagnesian mineral is believed to constitute up to 50% of the mantle?

Which ferromagnesian mineral is believed to constitute up to 50% of the mantle?

Which ferromagnesian mineral is believed to constitute up to 50% of the mantle?
A) Biotite
B) Amphibole
C) Olivine
D) Garnet

barry   2043   2 Replies

barry

Oxides are based around which negative ion?

Oxides are based around which negative ion?

Oxides are based around which negative ion?
A) F-
B) Cl-
C) O22-
D) S-

barry   3016   2 Replies

barry

Which type of convergence will result in a continental volcanic arc?

Which type of convergence will result in a continental volcanic arc?

Which type of convergence will result in a continental volcanic arc?
A) Oceanic-Continental
B) Oceanic-Oceanic
C) Continental-Continental

barry   2167   2 Replies

barry

Which group of minerals has two cleavages that are oriented at approximately 60°

Which group of minerals has two cleavages that are oriented at approximately 60°

Which group of minerals has two cleavages that are oriented at approximately 60° and 120°?
A) Pyroxenes
B) Potassium Feldspars
C) Amphiboles
D) Galena

barry   1099   2 Replies

barry

The ________ are the mineral class that accounts for more than 90% of the Earth'

The ________ are the mineral class that accounts for more than 90% of the Earth'

The ________ are the mineral class that accounts for more than 90% of the Earth's crust.
A) Silicates
B) Sulfates
C) Carbonates
D) Sulfides

barry   1035   2 Replies

barry

Ignoring color, what is the best method to distinguish between potassium feldspa

Ignoring color, what is the best method to distinguish between potassium feldspa

Ignoring color, what is the best method to distinguish between potassium feldspar and plagioclase feldspar?
A) Cleavage
B) Striations
C) Hardness
D) Streak

barry   1007   2 Replies

barry

A(n) ________ is a silicate structure where no silica tetrahedra share any oxyge

A(n) ________ is a silicate structure where no silica tetrahedra share any oxyge

A(n) ________ is a silicate structure where no silica tetrahedra share any oxygen ions.
A) Single Chain
B) Double Chain
C) Framework
D) Independent

barry   3288   2 Replies

barry

Ferromagnesian minerals are those that contain a great deal of ________.

Ferromagnesian minerals are those that contain a great deal of ________.

Ferromagnesian minerals are those that contain a great deal of ________.
A) Manganese and Iron
B) Potassium and Aluminum
C) Magnesium and Iron
D) Calcium and Silicon

barry   1843   2 Replies

barry

Which ions - positive ions or negative ions - tend to be larger and why?

Which ions - positive ions or negative ions - tend to be larger and why?

Which ions - positive ions or negative ions - tend to be larger and why?
A) Positive ions - they have more protons
B) Positive ions - they have more electrons
C) Negative ions - they have more neutrons
D) Negative ions - they have

barry   833   2 Replies

barry

The addition of ________ influences a mineral's color.

The addition of ________ influences a mineral's color.

The addition of ________ influences a mineral's color.
A) Water
B) Protons
C) Pigment
D) Trace elements

barry   2648   2 Replies

barry

Only eight elements make up the vast majority of rock-forming minerals. Which of

Only eight elements make up the vast majority of rock-forming minerals. Which of

Only eight elements make up the vast majority of rock-forming minerals. Which of the following elements is not one of the eight?
A) Oxygen
B) Sulfur
C) Iron
D) Potassium

barry   1648   2 Replies

barry

________ states that the angles between equivalent faces of crystals of the same

________ states that the angles between equivalent faces of crystals of the same

________ states that the angles between equivalent faces of crystals of the same mineral are always the same.
A) Law of Conservation of Mass
B) Law of Constancy of Interfacial Angles
C) Law of Superposition
D) Law of Opposite Inte

barry   1010   2 Replies

barry

Why will an iron-rich olivine have a higher density than a magnesium-rich olivin

Why will an iron-rich olivine have a higher density than a magnesium-rich olivin

Why will an iron-rich olivine have a higher density than a magnesium-rich olivine?
A) More magnesium is needed to equal the same atomic charge as iron
B) Iron-rich olivine has smaller crystals, so more of them will fit into the same area

barry   2683   2 Replies

barry

Which of the following terms does not describe a form of tenacity in a mineral?

Which of the following terms does not describe a form of tenacity in a mineral?

Which of the following terms does not describe a form of tenacity in a mineral?
A) Malleable
B) Sectile
C) Fibrous
D) Elastic

barry   1367   2 Replies

barry

Which is the strongest of the atomic bonds?

Which is the strongest of the atomic bonds?

Which is the strongest of the atomic bonds?
A) Ionic
B) Covalent
C) Metallic
D) Hybrid

barry   487   2 Replies

barry

Define the tenacity of a mineral.

Define the tenacity of a mineral.

Define the tenacity of a mineral.
A) Resistance to scratching
B) Parting along a plane of weakness
C) A specific pattern of fracturing
D) Resistance to breaking or deforming

barry   583   2 Replies

barry

Conchoidal fractures are indicative of the mineral ________.

Conchoidal fractures are indicative of the mineral ________.

Conchoidal fractures are indicative of the mineral ________.
A) Muscovite
B) Quartz
C) Fluorite
D) Olivine

barry   1972   2 Replies

barry

________ is defined as a mineral's resistance to scratching.

________ is defined as a mineral's resistance to scratching.

________ is defined as a mineral's resistance to scratching.
A) Hardness
B) Cleavage
C) Fracture
D) Streak

barry   2081   2 Replies

barry

Which of the following minerals has good cleavage in two directions?

Which of the following minerals has good cleavage in two directions?

Which of the following minerals has good cleavage in two directions?
A) Halite
B) Quartz
C) Plagioclase
D) Biotite

barry   635   2 Replies

barry

Which of the following is not one of the three primary ways minerals can form? A

Which of the following is not one of the three primary ways minerals can form? A

Which of the following is not one of the three primary ways minerals can form?
A) Metamorphism
B) Precipitation
C) Crystallization of molten material
D) Biological Processes

barry   1514   2 Replies

barry

According to the Octet Rule, atoms tend to gain, lose, or share electrons until

According to the Octet Rule, atoms tend to gain, lose, or share electrons until

According to the Octet Rule, atoms tend to gain, lose, or share electrons until they are surrounded by ________ valence electrons.
A) 2
B) 6
C) 8
D) 10

barry   1364   2 Replies

barry

What is an ion? (Multiple Choice)

What is an ion? (Multiple Choice)

What is an ion?
A) An atom that has more or fewer protons than it should
B) An atom that has more or fewer neutrons than it should
C) An atom that has more or fewer electrons than it should

barry   422   2 Replies

barry

Crystallization of molten rock will produce ________ rocks.

Crystallization of molten rock will produce ________ rocks.

Crystallization of molten rock will produce ________ rocks.
A) Metamorphic
B) Igneous
C) Sedimentary

barry   2275   2 Replies

barry

As long as an aqueous solution has not reached the saturation point, why won't t

As long as an aqueous solution has not reached the saturation point, why won't t

As long as an aqueous solution has not reached the saturation point, why won't the ions join to create mineral crystals?
A) The opposite charges of the ions repel each other
B) The ions are too close together to form a regular internal

barry   1346   2 Replies

barry

What mineral substance will most marine organisms produce?

What mineral substance will most marine organisms produce?

What mineral substance will most marine organisms produce?
A) SiO2
B) SO2
C) H2CO3
D) CaCO3

barry   1748   2 Replies

barry

________ refers to a mineral's intensity of reflected light.

________ refers to a mineral's intensity of reflected light.

________ refers to a mineral's intensity of reflected light.
A) Cleavage
B) Luster
C) Tenacity
D) Streak

barry   2261   2 Replies

barry

Which of the following is the hardest known natural substance?

Which of the following is the hardest known natural substance?

Which of the following is the hardest known natural substance?
A) Talc
B) Diamond
C) Quartz
D) Sapphire

barry   428   2 Replies

barry