Quiz 3a

Question 1

Shock metamorphism is most commonly found

Answer 1

Near impact craters

Question 2

A mineral that forms at a restricted temperature and pressure is called

Answer 2

Index mineral

Question 3

A foliated metamorphic rock with microscopic crystals, flat surgaces and a shiny luster is

Answer 3

Phylite

Question 4

A black non foliated metamorphic rock that has undergone the highest grade of metamorphism is

Answer 4

Hornsfel

Question 5

Pressure from all directions beneath the eath is called

Answer 5

Lithostatic

Question 6

Blue schist facies metamorphism would indicate conditions of

Answer 6

High pressure and low temperature

Question 7

The mineral that characterizes the green schist facies is

Answer 7

Chlorite

Question 8

The meta morphic rock that usually forms as a result of contact metamorphismis

Answer 8

Hornsfel

Question 9

The rocks contained in a formation must

Answer 9

have formed in the same enviorment

Question 10

The era of “ancient life” is the

Answer 10

Paleozoic

Question 11

The earlist period in the Paleozoic era is the

Answer 11

Cambrian

Question 12

The earth formed about

Answer 12

4.5 billion years ago

Question 13

The dinosaurs became extict

Answer 13

64 million years ago

Question 14

In the remaining amount of radioactive element left in a mineral is only 1/16 of the original amount how many half-lives have gone by since the mineral formed

Answer 14

4

Question 15

The parent isotope that is useful in determining the age of organic material that is a few thousand years old is

Answer 15

14C

Question 16

40K decays to

Answer 16

40Ar

Question 17

The key to sciendtific knowledge is that it must be

Answer 17

Based on repeatable observations and experiments

Question 18

An included fragment of rock must be

Answer 18

Older than the rock that contains it

Question 19

What type of unconformity has layers of sedimentary rocks over unlayered igneous or metamorphic rocks

Answer 19

Non conformity

Question 20

The principle of uniformatarianism states

Answer 20

the present is the key to the past

Question 21

The instrument used to determine the ages of samples by measuring tiny quantites of isotopes

Answer 21

Mass Spectrometer

Question 22

When Sedimentary rocks are fist deposited they will

Answer 22

be in a horizontal layer

Question 23

If a fault cuts across and moves a dike then

Answer 23

The fault must be younger than the dike

Question 24

According to Archbishop Ussher’s annotations, the earth was created in

Answer 24

4004 BC

Question 25

The force that dries mass wasting is

Answer 25

Gravity

Question 26

The greatest annual property loss in the United States is from

Answer 26

Creep and expansive soil