Fossils and Geologic Time

Question 1

The development of ____ helped protect the planet from radiation from sun.

Accepted Answer

ozone

Question 2

True or False: Fossils most often form when a dead organism is buried in sediment.

Accepted Answer

True

Question 3

Gaps in rock layers that develop when erosion removes existing rock layers

Accepted Answer

unconformities

Question 4

made when sediments fill in a cavity and harden

Accepted Answer

cast

Question 5

Animal life in the Paleozoic Era included all of the following except ___.

Accepted Answer

humans

Question 6

T or F: Carbon dating would be useful in dating the age of Earth itself.

Accepted Answer

False

Question 7

T or F: Absolute age examines the position of rocks in a sequence.

Accepted Answer

False

Question 8

Which is the difference between Carbon 12 and Carbon 14?

Accepted Answer

NUMBER OF NEUTRONS

Question 9

states that for undisturbed rocks, the oldest are at the bottom

Accepted Answer

principle of superposition

Question 10

In series of undisturbed rock layers where shale is between sandst. below and Limes. above the_

Accepted Answer

limestone is youngest

Question 11

T or F: Dinosaur footprints are original remains.

Accepted Answer

False

Question 12

____ on the geologic timescale are marked by major events and worldwide changes in fossils

Accepted Answer

Eras

Question 13

hollow place in rock made when an organism died

Accepted Answer

mold

Question 14

calculating absolute age by measuring the parent and daughter isotopes and half life

Accepted Answer

absolute dating

Question 15

Which of the following is an example of absolute age?

Accepted Answer

10,000 years old

Question 16

A life -form in Precambrian time was ____.

Accepted Answer

bacteria and algae

Question 17

Pageae was the dominant land feature during the ______.

Accepted Answer

mesozoic

Question 18

Little is known about Earth's early history because ___.

Accepted Answer

all of the above

Question 19

With ___ dating rocks age can be determined but with ___ dating rock is compared to other rocks

Accepted Answer

Absolute, relative

Question 20

The order of events and relative age of rocks is determined by rock sequence

Accepted Answer

relative dating

Question 21

____ existed during the mesozoic era

Accepted Answer

all of the above

Question 22

Gaps in rock layers are called ___. We know that missing rock shows missing time in rock record

Accepted Answer

unconformities

Question 23

T or F: Index Fossils are the remains of species that existed widespread on Earth - short time.

Accepted Answer

True

Question 24

fossil formed when an outline is formed from left over carbon

Accepted Answer

carbon film

Question 25

The division of Earth's history into smaller units makes up the _____.

Accepted Answer

geologic time scale

Question 26

The longest subdivision in geologic time is a(n) ____.

Accepted Answer

eon

Question 27

Which isotope is useful for dating animal and plant life that is less than 70,000 years old?

Accepted Answer

Carbon 14

Question 28

All of the following help preserve organisms as fossil EXCEPT_____.

Accepted Answer

activities of decomposers

Question 29

The change in environments that may have occurred at end of Paleozoic may have been from__.

Accepted Answer

plate tectonics caused volcanic eruptions

Question 30

T or F: Carbon films are formed when a thin film of carbon is left, forming a silhouette.

Accepted Answer

True

Question 31

According to Darwin's theory of natural selection what type of organism is best able to survive

Accepted Answer

those with variations best suited to environment

Question 32

A bed of fossils that are 555 million Y.O. is__a sandstone bed with 400mill. Y.o. fossils.

Accepted Answer

older than

Question 33

Geologic time is divided into units based upon types of _____.

Accepted Answer

organisms and major worldwide events

Question 34

States that Earth processes today are similar to those that took place in the past

Accepted Answer

uniformitarianism

Question 35

Animal life in the Cenozoic Era includes all of the following except ____.

Accepted Answer

trilobites

Question 36

the time it takes for half of the atoms in an isotope to decay.

Accepted Answer

half life

Question 37

Determining the order of events and relative age by looking at rock position in sequence.

Accepted Answer

relative dating

Question 38

Differences among individual members of the same species are referred to as

Accepted Answer

variation

Question 39

If a layer of sands. lies on layer of limes.that contains a 300 mill yo fossil the ss must be__

Accepted Answer

younger than 300 million

Question 40

Fossils of species that lived on Earth for a short time, were abundant and widespread

Accepted Answer

index fossils

Question 41

If the same sequence of rock layers is observed over a large area, ___.

Accepted Answer

a large deposit of rock formed over large areas

Question 42

The end of the Paleozoic Era was signaled by ____.

Accepted Answer

mass extinction of land and sea animals due to volcano

Question 43

Which era do we see life forms such as humans appear, but extinction of large mammals occurred.

Accepted Answer

Cenozoic

Question 44

A Life form that evolved during the ____ era was the dinosaur

Accepted Answer

Mesozoic

Question 45

Individuals that have a variation giving them advantage in the environment are likely to ...

Accepted Answer

survive and reproduce

Question 46

Life forms that existed during the Paleozoic Era included _____.

Accepted Answer

all of the above

Question 47

T or F: To be a useful index fossil a species must have been rare and found in localized areas.

Accepted Answer

False

Question 48

___ dating uses the properties of atoms in rocks to find age.

Accepted Answer

absolute

Question 49

Humans first appeared during the _____ era.

Accepted Answer

Cenozoic

Question 50

Rock layers are correlated if they both contain the same _____.

Accepted Answer

fossils

Fossils and Geologic Time

Questions 50

Fossils and Geologic Time

Questions 50