Geologic Time Scale (1)

Question 1

is a branch of geology that deals with the origin, composition, structure and classification of rocks.

Accepted Answer

Petrology

Question 2

is the study of rocks layers (strata) and layering (stratifications).

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Stratigraphy

Question 3

studies the life that existed prior to, or sometimes at the start of the Holocene epoch(current geologic epoch)

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Paleontology

Question 4

places, events or rocks in their chronological sequence or order of occurrence without knowing the actual age

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Relative Dating

Question 5

One can find out which layer was formed first relative to other layers.

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Relative Dating

Question 6

What is the relative order of geologic events can be established by applying the following principle:

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1.Principle of Original Horizontality 2. Principle of super position 3.The Principle of Cross-Cutting Relationships 4.The Principle of Inclusion

Question 7

sedimentary rocks are deposited horizontal or nearly horizontal layers.

Accepted Answer

Principle of Original Horizontality

Question 8

Any deviation from horizontality indicates that deformation occurs after the deposition.

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Principle of Original Horizontality

Question 9

in the sequence of sedimentary rocks, the layer at the bottom is the oldest, and the successively higher levels are younger

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Principle of super position

Question 10

geologic features like faults or igneous intrusions are younger than the rocks they cut across.

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The Principle of Cross-Cutting Relationships

Question 11

if rock fragments are included with another rock layer, the rock fragments must be older than the rock layer where they were embedded.

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The Principle of Inclusion

Question 12

places actual age of rocks and events.

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Absolute Dating

Question 13

The methods use in this technique is based on the decay rate of a certain radioactive isotopes within the fossils, rocks and artifacts.

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Absolute Dating

Question 14

With the knowledge of decay rate the, ratios of parent and daughter isotopes, the absolute date may be computed.

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Absolute Dating

Question 15

a geologic term of the break of dispositional sequence (in Cavite)

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Unconformity

Question 16

it represent time missing from depositional record.

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Unconformity

Question 17

is a remnant or trace of organism of past geologic age.

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Fossils

Question 18

Fossils are classified based on their information. What are the 4 types of fossils

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1.True form fossil 2.Mold fossils 3.Cast fossils 4.Trace fossils or ichnofossils

Question 19

shows the complete structure of an organism

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True form fossil

Question 20

A 'true fossil' ,The wooly mammoth was discovered in an ice tomb. True or False

Accepted Answer

True

Question 21

A 'true fossil' ,The wooly mammoth was discovered in an ice berg. True or False

Accepted Answer

False

Question 22

hollow impressions of a living thing in a rock.

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Mold fossils

Question 23

It reflects only the shape and surface of the organisms.

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Mold fossils

Question 24

formed when a mold fossil is filled with minerals

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Cast fossils

Question 25

impression on rocks showing various activities. Fossils can be foot prints, eggs, droppings or nest of animals.

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Trace fossils or ichnofossils

Question 26

What are the two principles of fossil succession

Accepted Answer

1. Fossil organisms succeed one another in a definite and determinable order. Thus, any time period can be recognized by its fossil content.
2. Once fossils are recognized as time indicators, they are used in correlating rocks of similar age in different regions.

Question 27

fossil organisms succeed one another in a definite and determinable order. Thus, any time period can be recognized by its fossil content.

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Principle of fossil succession

Question 28

Once fossils are recognized as time indicators, they are used in correlating rocks of similar age in different regions.

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Principle of fossil succession

Question 29

are fossils associated with particular span of geologic time.

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Index Fossils

Question 30

Geologist divide the 4.6 billion years of Earth's history into different units: eons, eras, periods and epoch. True or False

Accepted Answer

True

Question 31

Geologist divide the 4.6 billion years of Earth's history into different units: eons, eras, periods, cycle and epoch. True or False

Accepted Answer

False

Question 32

Are the current features of earth the same as its features 4.6 billion years ago?

Accepted Answer

No, because the earth changes environment over time.

Question 33

- How are scientist able to describe Earth's history?

Accepted Answer

Through rocks and fossils

Question 34

Describe the history of Earth.

Accepted Answer

EARTH undergoes EVOLUTIONARY PROCESS arrange chronologically in GEOLOGIC TIME SCALE based on EVIDENCE/INFORMATION from ROCKS and FOSSILS through RELATIVE DATING or ABSOLUTE DATING. GEOLOGIC TIME SCALE is divided into 4 UNITS such as EON, ERA, PERIOD, PERIOD, and EPOCH.

Question 35

What are the 4 eras?

Accepted Answer

Precambrian, Paleozoic, Mesozoic, and Cenozoic

Geologic Time Scale (1)

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