Question 15 out of 5 points

The term __________ refers to large-scale deformation of Earth's lithosphere.Selected Answer:

 tectonics

Correct Answer:

 tectonics

Question 25 out of 5 points

Earth's __________ includes the crust and part of the upper mantle.Selected Answer:

 lithosphere

Correct Answer:

 lithosphere

Question 35 out of 5 points

A scientific __________ is a well tested and widely accepted view that scientists agree best explains observable facts.Selected Answer:

 theory

Correct Answer:

 theory

Question 45 out of 5 points

The __________ is a hot, weak zone that is capable of gradual flow located within Earth between the depths of 100 and 350 kilometers.Selected Answer:

 asthenosphere

Correct Answer:

 asthenosphere

Question 55 out of 5 points

The doctrine of __________ is commonly stated as "the present is the key to the past."Selected Answer:

 uniformitarianism

Correct Answer:

 uniformitarianism

Question 65 out of 5 points

A scientific __________ is a preliminary, untested explanation of a natural phenomenon.Selected Answer:

 hypothesis

Correct Answer:

 hypothesis

Question 75 out of 5 points

The accepted age of Earth is about __________ years.Selected Answer:

 4.5 billion

Correct Answer:

 4.5 billion

Question 85 out of 5 points

__________ are the remains or traces of prehistoric life.Selected Answer:

 Fossils

Correct Answer:

 Fossils

Question 95 out of 5 points

The science of geology is traditionally divided into two broad areas-physical geology and __________ geology.

Selected Answer:

 historical

Correct Answer:

 historical

Question 105 out of 5 points

According to the plate tectonics model, Earth's rigid outer shell is broken into large slabs called __________.Selected Answer:

 plates

Correct Answer:

 plates

Question 115 out of 5 points

Which one of the following is NOT one of the three classes of rocks?Selected Answer:

 amorphous

Correct Answer:

 amorphous

Question 125 out of 5 points

Subduction zones are usually associated with oceanic ridge systems.Selected Answer:

 False

Correct Answer:

 False

Question 135 out of 5 points

The physical, chemical, and biological laws that operate today also operated in the geologic past.Selected Answer:

 True

Correct Answer:

 True

Question 145 out of 5 points

Radioactivity is used to determine numerical geologic dates.

Selected Answer:

 True

Correct Answer:

 True

Question 155 out of 5 points

Geologists are now able to assign fairly accurate dates to events in Earth's history.Selected Answer:

 True

Correct Answer:

 True

Question 15 out of 5 points

The process whereby ions begin to arrange themselves into orderly patterns is called __________.Selected Answer:

 crystallization

Correct Answer:

 crystallization

Question 25 out of 5 points

The volcanic (fine-grained) equivalent of granite is __________.Selected Answer:

 rhyolite

Correct Answer:

 rhyolite

Question 35 out of 5 points

Igneous rocks are most often classified by their __________ and mineral composition.

Selected Answer:

 texture

Correct Answer:

 texture

Question 45 out of 5 points

__________ are the spherical or elongated openings seen in many aphanitic rocks left by escaping gas bubbles as magma solidifies.Selected Answer:

 Vesicles

Correct Answer:

 Vesicles

Question 55 out of 5 points

Which one of the following does NOT refer to the texture of an igneous rock?Selected Answer:

 clastic

Correct Answer:

 clastic

Question 65 out of 5 points

Igneous rocks which have potassium feldspar and quartz as their primary components are said to have a(n) __________ composition.Selected Answer:

 granitic

Correct Answer:

 granitic

Question 75 out of 5 points

The most important factor affecting the texture of an igneous rock is the __________ of the magma.

Selected Answer:

 rate of cooling

Correct Answer:

 rate of cooling

Question 85 out of 5 points

The slow cooling of magma results in the formation of rather __________ mineral crystals.Selected Answer:

 large

Correct Answer:

 large

Question 95 out of 5 points

The intrusive equivalent of basalt is __________.Selected Answer:

 gabbro

Correct Answer:

 gabbro

Question 105 out of 5 points

The best-known and most important ore deposits are those that are produced from __________ solutions.Selected Answer:

 hydrothermal

Correct Answer:

 hydrothermal

Question 115 out of 5 points

Rocks that consist of unordered atoms are referred to as __________.Selected Answer:

 gla

ssCorrect Answer:

 glass

Question 125 out of 5 points

The rocks that result when lava solidifies are referred to as extrusive, or volcanic.Selected Answer:

 True

Correct Answer:

 True

Question 135 out of 5 points

Phenocrysts refer to the matrix of smaller crystals in a porphyritic igneous rock.Selected Answer:

 False

Correct Answer:

 False

Question 145 out of 5 points

Granite is the most common extrusive igneous rock.Selected Answer:

 False

Correct Answer:

 False

Question 155 out of 5 points

Obsidian is a dark-colored, glassy rock which usually forms when silica-rich lava is quenched quickly.Selected Answer:

 True

Correct Answer:

 True

Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?Selected  

Answer: only the amount of dissolved gas in the magma and the temperature of the magma

Correct Answer:

 all of these

Question 25 out of 5 points

A lava flow with a surface of rough, jagged blocks and sharp, angular projections is termed __________ lava.Selected Answer:

 aa

Correct Answer:

 aa

Question 35 out of 5 points

The most abundant gas associated with volcanic activity is __________.Selected Answer:

 water vapor

Correct Answer:

 water vapor

Question 45 out of 5 points

The most violent volcanic activity is associated with __________.Selected Answer:

 composite cones

Correct Answer:

 composite cones

Question 55 out of 5 points

The Columbia Plateau in the northwestern United States is an excellent example of __________.Selected Answer:

 flood basalts

Correct  

Answer: flood basalts

Question 65 out of 5 points

Which of the factors listed below affects the melting point of rock and sediment?Selected Answer:

 all of these

Correct Answer:

 all of these

Question 75 out of 5 points

Kilauea is an example of a __________.Selected Answer:

 shield volcano

Correct Answer:

 shield volcano

Question 85 out of 5 points

Mount St. Helens is an example of a __________.Selected Answer:

 composite cone

Correct Answer:

 composite cone

Question 95 out of 5 points

This type of volcano is usually created when andesitic lavas are extruded.Selected Answer:

 composite cone

Correct Answer:

 composite cone

Question 105 out of 5 points

Shiprock, New Mexico, is thought to be a __________.Selected Answer:

 volcanic neck

Correct Answer:

 volcanic neck

Question 115 out of 5 points

Most of the active volcanoes on Earth are located in a belt known as the __________.Selected Answer:

 Ring of Fire

Correct Answer:

 Ring of Fire

Question 125 out of 5 points

The Cascade Range in the western United States is associated with __________ volcanism.Selected Answer:

 subduction zone

Correct Answer:

 subduction zone

Question 135 out of 5 points

The largest igneous intrusive body is called a __________.Selected Answer:

 batholith

Correct Answer:

 batholith

Question 145 out of 5 points

Which one of the following intrusive structures is tabular and concordant?Selected Answer:

 

sill

Correct Answer:

 sill

Question 155 out of 5 points

The volcanic eruptions on the island of Hawaii may be described as relatively quiet when compared to eruptions such as those that occurred at Mount St. Helens.Selected Answer:

 True

Correct Answer:

 True