Exam 9: The Pace of Change

Briefly review the history of the theory of plate tectonics.What was Alfred Wegenerʹs role? What evidence did he present? Why was his theory NOT widely accepted initially? What new evidence led to its later acceptance?

Which of the following is CORRECT in regards to the geologic time scale?

Exogenic processes cause warping,folding,faulting,and uplift of Earthʹs surface.

A rock transformed from any other rock through extreme heat and or pressure is referred to as

Travertine,formed from the CaCO₃ that has been precipitated from groundwater,is an example of _______sedimentary rock.

In terms of the geologic cycle,which of the following is NOT an exogenic process?

The Hawaiian Islands were formed as a result of

Scientists have direct evidence of Earthʹs internal structure down to upper mantle.

The average length of a period during which a given magnetic field polarity exists is about

During the past ice age,landmasses were generally

Approximately 95% of Earthʹs crust is made up of

Which of the following are located along the mid-ocean ridges?

In terms of dating of specific rocks,structures,or landscapes,numerical age refers to

Glaciers that once covered the Hudson Bay area melted 8,000 years ago.As a result of this,the bay is gradually rising.In another 10,000 years or so,it will have risen above sea level and become dry.This process can best be considered an example of

The relative age of geologic features is ascertained through the use of radiometric dating.

Earthʹs magnetic field is generated from within the uppermost mantle and crust.

Sedimentary rock formed from dissolved minerals that precipitate out of water solution and build up to form rock are

Which of the following is NOT a process than can cause metamorphism?

Which of the following statements about Earthʹs core is NOT correct?

Obsidian is an igneous rock with a glassy appearance and minimal crystal growth.What accounts for this?