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Exam 12: Earth S Internal Structure, rock Cycle, and Geologic Time

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Question 41

Multiple Choice

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Rocks that form from melted rock that has cooled and solidified are

A) igneous.
B) metamorphic.
C) sedimentary.
D) clastic.
E) ALL of these.

F) A) and C)
G) A) and E)

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Question 42

Multiple Choice

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Contact metamorphism occurs by

A) minerals precipitating from seawater.
B) the rock being near molten rock.
C) rock becoming deeply buried.
D) the rock being heated until it melts.
E) rock fragments becoming lithified.

F) D) and E)
G) C) and D)

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Question 43

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Obsidian is an evaporite.

The model that shows how Earth materials are changed from one rock family to another through time is called

What is another name for the continental crust?

We know more about the Jurassic than the Pleistocene.

Which of the following is an organic sedimentary rock?

___[1]____ cools on Earth's surface to form ____[2]_____,and ___[3]____ cools inside the Earth to form ____[4]_____. Answer 1 Choices Lava Magma Answer 2 Choices: clastic sedimentary rock extrusive igneous rock intrusive igneous rock metamorphic rock Answer 3 Choices: lava magma Answer 4 Choices clastic sedimentary rock extrusive igneous rock intrusive igneous rock metamorphic rock

What are the two most abundant elements in the Earth's crust?

Continental crust is mostly

Metamorphic means

The Holocene is the past 10,000 years.

Coal is a chemical sedimentary rock.

Magma that penetrates between rock layers forms a

The outer core is the dominant cause of the Earth's magnetic field.

An important characteristic of most sedimentary rocks is that they are layered.

Each rock family can form from rocks that were previously in any of the three rock families.

Vibrations that travel through the Earth when stress is released in an earthquake are

The calendar of Earth history is called the

On the geologic time scale,the oldest events are at the top.