HW 9

Boundaries between intervals of the geological time scale are determined by

Major events in Earth's history, such as major extinctions.

Which of the following is CORRECT regarding the geologic time scale?

The bulk of Earth's history has occurred during the Precambrian eon

Which of the following is NOT a criteria to be classified as a mineral?

anthropogenic

Areas of upwelling material from the mantle to form new seafloor occur along

divergent boundaries

Sedimentary rocks are more a product of the ________ system whereas metamorphic and igneous rocks are more a product of the ________ system.

exogenic; endogenic

The subfield of geography and geology concerned with the study of the origins, evolutions, form, and spatial distribution of Earth's landforms is

geomorphology

Continental crust is basically ________, whereas oceanic crust is basically ________.

granite; basalt

________ are sites of upwelling of magma from the mantle independent of plate boundaries.

hot spots

Molten rock beneath Earth's surface is known as ________, whereas molten rock on Earth's surface is called ________.

magma; lava

An element or combination of elements that forms an inorganic, natural compound is called a

mineral

Metamorphism that occurs over broad areas when the pressure and associated heat of of overlaying rocks or other tectonic forces cause the rocks to undergo deformation is known as

regional metamorphism

An assemblage of minerals bound together is called a

rock

the three basic rock types are

sedimentary, metamorphic, and igneous

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

solidification of magma

uniformitarianism assumes that

the same physical processes we see today are a key to understanding the processes that have been operating throughout geologic time.

Areas where plates slide past one another, usually at right angles to a seafloor spreading are

transform boundaries

Which of the following is an endogenic process?

volcanism

Which of the following is an exogenic process?

weathering

In 1912, the theory of continental drift was proposed by _______________________________.

Alfred Wegener

Areas of crustal collision and subduction occur along

convergent boundaries