Geography and Earth Sciences

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   1931   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   1630   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   1327   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   2323   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   1409   2 Replies

barry

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   2491   2 Replies

barry

Which is denser: 100 million year-old oceanic lithosphere near a convergent boun

Which is denser: 100 million year-old oceanic lithosphere near a convergent boun

Which is denser: 100 million year-old oceanic lithosphere near a convergent boundary, 15 million year-old oceanic lithosphere near a rift, or the upper part of the asthenosphere?
A) 15 million year-old oceanic lithosphere
B) 100 million yea

barry   1132   2 Replies

barry

Samples from the seafloor around the Mid-Atlantic Ridge and the East Pacific Ris

Samples from the seafloor around the Mid-Atlantic Ridge and the East Pacific Ris

Samples from the seafloor around the Mid-Atlantic Ridge and the East Pacific Rise show that both areas have been creating new material in the last five million years. Samples from the East Pacific Rise show the five million year old seafloor is three

barry   795   2 Replies

barry

How can the orientation of transform faults provide information about the direc

How can the orientation of transform faults provide information about the direc

 How can the orientation of transform faults provide information about the direction of plate motion?
A) Transform faults are oriented perpendicular to the direction of plate motion
B) Transform faults radiate out from the rift zone located

barry   549   2 Replies

barry

Which of the following statements best describes the tectonic setting for Mount

Which of the following statements best describes the tectonic setting for Mount

Which of the following statements best describes the tectonic setting for Mount St. Helens and the other Cascade volcanoes?
A) A chain of young, active volcanoes built on a continental margin above a sinking slab of oceanic lithosphere
B) A

barry   2003   2 Replies

barry

All of the following are evidence supporting the theory of plate tectonics excep

All of the following are evidence supporting the theory of plate tectonics excep

All of the following are evidence supporting the theory of plate tectonics except for ________.
A) Changes in the Moon's orbit due to shifting plates
B) Ocean floor drilling
C) Hot spots
D) Measurements of plate motions

barry   884   2 Replies

barry

Where is the top of the asthenosphere is closest to Earth's surface?

Where is the top of the asthenosphere is closest to Earth's surface?

Where is the top of the asthenosphere is closest to Earth's surface?
A) Along a mid-ocean ridge
B) Above a deep mantle hot spot
C) Along a transform fault
D) Along a subduction zone

barry   1672   2 Replies

barry

________ is when iron particles in lavas align their magnetic fields with magnet

________ is when iron particles in lavas align their magnetic fields with magnet

________ is when iron particles in lavas align their magnetic fields with magnetic north, preserving a record of that pole's location at that moment in time.
A) Mantle Plume
B) Paleomagnetism
C) Magnetic Reversal
D) Seafloor

barry   1418   2 Replies

barry

A typical rate of seafloor spreading in the Atlantic Ocean is ________.

A typical rate of seafloor spreading in the Atlantic Ocean is ________.

A typical rate of seafloor spreading in the Atlantic Ocean is ________.
A) 2 meters per year
B) 0.1 inches per year
C) 20 feet per year
D) 2 centimeters per year

barry   2159   2 Replies

barry

What is a mantle plume?

What is a mantle plume?

What is a mantle plume?
A) The magma that rises up from the mantle at a divergent plate boundary
B) Material rising up from a subducting plate going through partial melting
C) A form of batholith composed of ferromagnesian materials

barry   629   2 Replies

barry

In July 1863, Union and Confederate forces fought in a three-day battle at Getty

In July 1863, Union and Confederate forces fought in a three-day battle at Getty

In July 1863, Union and Confederate forces fought in a three-day battle at Gettysburg, PA. The Confederate position was on Seminary Ridge, an igneous dike. The Union position was on Cemetery Ridge, an igneous sill. Using what you know about the histo

barry   638   1 Reply

savio

why does my dish washing sponge smell?

why does my dish washing sponge smell?

it kind of smells like something is rotting. not quite.. but .. it's a rather sour smell. smells like these usually come from bacteria right? so why are so many bacteria growing on my dish washing sponge of all places? there should be the least

iScience   1266   9 Replies

barry

How will mantle-derived magma change when it ponds against crustal rocks?

How will mantle-derived magma change when it ponds against crustal rocks?

How will mantle-derived magma change when it ponds against crustal rocks?

barry   714   2 Replies

barry

The two branches of Bowen's Reaction Series are the continuous series and the di

The two branches of Bowen's Reaction Series are the continuous series and the di

The two branches of Bowen's Reaction Series are the continuous series and the discontinuous series. In what ways do the minerals in the discontinuous series differ from each other? And the minerals in the continuous series?

barry   661   2 Replies

barry

When teaching about igneous rocks, one trick instructors often use to help stude

When teaching about igneous rocks, one trick instructors often use to help stude

When teaching about igneous rocks, one trick instructors often use to help students determine the igneous composition of the samples is to use the color of the rocks as a guide. Explain how the color of an igneous rock can often be used as an indicat

barry   883   2 Replies

barry

Magmas in the magma chamber of a volcano are often compared to soda to explain h

Magmas in the magma chamber of a volcano are often compared to soda to explain h

Magmas in the magma chamber of a volcano are often compared to soda to explain how the magma is erupted. How is magma like a bottle of soda? What happens to both substances when the pressure changes?

barry   628   2 Replies

barry

What is the role that depth can play on cooling and crystallization on igneous r

What is the role that depth can play on cooling and crystallization on igneous r

What is the role that depth can play on cooling and crystallization on igneous rocks?

barry   314   2 Replies

barry

Explain how columnar jointing is a function of cooling

Explain how columnar jointing is a function of cooling

Explain how columnar jointing is a function of cooling

barry   343   2 Replies

barry

Based on thickness and extent, what interpretations could be made about the visc

Based on thickness and extent, what interpretations could be made about the visc

Based on thickness and extent, what interpretations could be made about the viscosity of the magma that created a dike?

barry   325   2 Replies

barry

What are two ways a primary magma can be generated?

What are two ways a primary magma can be generated?

What are two ways a primary magma can be generated?

barry   501   2 Replies

barry

How could a researcher use magmatic differentiation to determine if a batholith

How could a researcher use magmatic differentiation to determine if a batholith

How could a researcher use magmatic differentiation to determine if a batholith is the result of one body of magma cooling and crystallizing or multiple bodies of magma?

barry   604   2 Replies

barry

In the process of a magma cooling and crystallizing, if the original melt contai

In the process of a magma cooling and crystallizing, if the original melt contai

In the process of a magma cooling and crystallizing, if the original melt contained large amounts of iron, why isn't quartz a ferromagnesian mineral?

barry   408   2 Replies

barry

How would you expect the geothermal gradient to change if this borehole were dri

How would you expect the geothermal gradient to change if this borehole were dri

How would you expect the geothermal gradient to change if this borehole were drilled near Yellowstone National Park? Why?

barry   410   2 Replies

barry

How does this gradient compare to the average geothermal gradient?

How does this gradient compare to the average geothermal gradient?

How does this gradient compare to the average geothermal gradient?

barry   409   2 Replies

barry

Assuming a temperature of 20°C at the ground surface, what is the temperature at

Assuming a temperature of 20°C at the ground surface, what is the temperature at

Assuming a temperature of 20°C at the ground surface, what is the temperature at a depth of 2 miles?

barry   448   2 Replies

barry

Why would rhyolite deposits be less common than granite deposits?

Why would rhyolite deposits be less common than granite deposits?

Why would rhyolite deposits be less common than granite deposits?

barry   933   2 Replies

barry

All rocks are classified according to ________ and ________.

All rocks are classified according to ________ and ________.

All rocks are classified according to ________ and ________.

barry   498   2 Replies

barry

Circle the intrusive igneous textures below. Phaneritic, Aphanitic, Glassy, Pyr

Circle the intrusive igneous textures below. Phaneritic, Aphanitic, Glassy, Pyr

Circle the intrusive igneous textures below.

Phaneritic, Aphanitic, Glassy, Pyroclastic, Pegmatitic

barry   599   2 Replies

barry

Slow cooling produces ________ crystals whereas fast cooling produces ________ c

Slow cooling produces ________ crystals whereas fast cooling produces ________ c

Slow cooling produces ________ crystals whereas fast cooling produces ________ crystals.

barry   749   2 Replies

barry

How does the presence of silica affect the temperature and viscosity of magma?

How does the presence of silica affect the temperature and viscosity of magma?

How does the presence of silica affect the temperature and viscosity of magma?

barry   603   2 Replies

barry

Will density increase or decrease with the crystallization of a magma?

Will density increase or decrease with the crystallization of a magma?

Will density increase or decrease with the crystallization of a magma?

barry   663   2 Replies

barry

Below is a list of elements. Eight of these elements represent the most common e

Below is a list of elements. Eight of these elements represent the most common e

Below is a list of elements. Eight of these elements represent the most common elements on Earth. Circle the eight most common elements found in the Earth's crust.

Silicon, Rubidium, Nitrogen, Carbon, Sodium, Manganese, Hydrogen, Oxyg

barry   500   2 Replies

barry

Igneous rocks and metamorphic rocks derived from igneous "parents" make up what

Igneous rocks and metamorphic rocks derived from igneous "parents" make up what

Igneous rocks and metamorphic rocks derived from igneous "parents" make up what percentage of the Earth's crust?
A) 50%
B) 95%
C) 82%
D) 75%

barry   1336   2 Replies

barry

What three components make up most magmas?

What three components make up most magmas?

What three components make up most magmas?
A) Silicon, Potassium Feldspar, and Muscovite
B) Water, Melted Rock, and Solid Crystals
C) Lava, Ash, and Gas
D) Liquid Portion, Solid Portion, Gaseous Portion

barry   3802   2 Replies

barry

Select the choice below that best describes the role of volatiles in an ascendin

Select the choice below that best describes the role of volatiles in an ascendin

Select the choice below that best describes the role of volatiles in an ascending magma.
A) Volatiles increase the rate of crystallization in intrusive structures
B) Volatiles will force the magma to contract as it rises
C) Volatiles w

barry   1513   2 Replies

barry