Molten rock is called lava when it is beneath the surface of the…

Molten rock is called lava when it is beneath the surface of the Earth and it is called magma when it flows out upon the surface of the Earth.

Group of answer choices 

True 

False 

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Question 2 

The viscosity of magma is related upon the magma’s silica content, gas content, and eruptive temperature.

Group of answer choices 

True 

False 

Flag question: Question 3 

Question 3 

Which of the following lava compositions has the greatest viscosity?

Group of answer choices 

Intermediate 

Mafic 

Felsic 

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Question 4  

________________ magmas will usually produce lava flows and create shield volcanoes.

Group of answer choices 

Granitic 

Basaltic 

Andesitic 

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Question 5 

____________________ magmas will usually produce pyroclastic eruptions and create composite cones or stratovolcanoes.

Group of answer choices 

Granitic 

Andesitic 

Basaltic 

Flag question: Question 6 

Question 6 

The Columbia Plateau in the northwestern United States is an excellent example of ________.

Group of answer choices 

caldera 

flood basalt 

pillow lava 

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Question 7 

Yellowstone National Park is an example of a ________________.

Group of answer choices 

caldera 

flood basalt 

crater collapse structure 

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Question 8 

The image below is an example of a(n) ___________.

Group of answer choices 

shield volcano 

stratovolcano or composite cone 

cinder cone 

Flag question: Question 9 

Question 9 

The image below is an example of a(n) _____________.

Group of answer choices 

cinder cone 

caldera 

stratovolcano or composite cone 

Flag question: Question 10 

Question 10  

Two ways magma can form from solid rock are _________________ and ________________.

Group of answer choices 

addition of chemically active fluids not including water to the rocks and compression melting

melting due to the geothermal gradient only and addition of acidic fluids to the magma

decompression melting and the addition of water to the magma

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Question 11 

Mantle plumes and superplumes are the source of magma that can create volcanoes at _________________.

Group of answer choices 

divergent boundaries 

ocean-continent convergent boundaries 

hot spots 

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Question 12  

The remains of a magma chamber that has cooled and crystallized is a _______________.

Group of answer choices 

cold magma chamber 

pluton 

volcanic chamber 

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Question 13 

The image below is an example of _____________.

Group of answer choices 

jointed lava 

columnar jointing 

octagonal jointing 

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Question 14 

_________________ is the idea that the same physical, chemical, and biological processes that operate on Earth today have operated during the history of the Earth.  These forces have slowly shaped the Earth’s surface so the Earth is very old.  

Group of answer choices 

Uniformitarianism 

Catastrophism 

Contrarianism 

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Question 15  

__________________ is sequencing rocks by age using correlation and fossils.

Group of answer choices 

Absolute Dating 

Sequence Dating 

Relative Dating 

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Question 16  

___________________ are the remains of plants and animals that lived in the geologic past.  They are preserved in ____________ rocks.

Group of answer choices 

Dead plants and animals, sedimentary

Fossils; metamorphic 

Fossils; sedimentary 

Flag question: Question 17 

Question 17 2  

The image below shows a(n)_________________.

Group of answer choices 

angular unconformity 

nonconformity 

disconformity 

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Question 18  

The _______________ divides the Earth’s geologic history into units based upon geologically recognized events.

Group of answer choices 

Geologic Time Scale 

Earth’s Time Scale 

Rock Time Scale 

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Question 19 

Using the known rates of radioactive decay to date the crystallization of certain minerals is known as ________ dating

Group of answer choices 

radiometric dating 

uranium dating 

relative dating 

Flag question: Question 20 

Question 20  

Radiometric dates are expressed as ____________.

Group of answer choices 

half-lives 

quarter-lives 

remaining number of atoms 

Flag question: Question 21 

Question 21 

The rocks that are commonly dated using radiometric dating are____________.

Group of answer choices 

sedimentary rocks 

igneous lava flows and ash beds 

metamorphic rocks 

Flag question: Question 22 

Question 22 2 pts 

The oldest known rocks on Earth so far may be about _______________ billion years old and are found in northern Quebec, Canada.

Group of answer choices 

4.8 

3.8 

5.8 

Flag question: Question 23 

Question 23 2 pts 

In addition to dating, fossils can be used to help identify ancient environments and ancient ocean water temperatures.

Group of answer choices 

True 

False 

Flag question: Question 24 

Question 24 2 pts 

The dark bed of igneous rock that crosses the horizontal beds of reddish rocks is  called a  ______________.

Group of answer choices 

stock 

dike 

sill 

Flag question: Question 25 

Question 25 

The largest igneous intrusive bodies are called ______________________.

Group of answer choices 

batholiths 

sills 

dikes