Fossils/Geological time/Relative,Absolute time- Knoxville

Question 1

What is an intrusion?

Accepted Answer

lava that cools and hardens beneath the surface

Question 2

What is scientific theory?

Accepted Answer

well tested concept that explains a range of observations

Question 3

How long ago did Earth form?

Accepted Answer

46 billion years ago

Question 4

What is a key bed?

Accepted Answer

a single rock layer that occurs over a large area

Question 5

What is a trace fossil?

Accepted Answer

provide evidence of activities of organisms

Question 6

Three ways fossils are preserved

Accepted Answer

tar, ice, or amber

Question 7

"I woke up at 6:30am this morning." is what?

Accepted Answer

Absolute time

Question 8

What is eras?

Accepted Answer

marked by changes in types of fossils present in rock

Question 9

This often called Age of Invertebrates?

Accepted Answer

Early Paleozoic Era

Question 10

What is a mold?

Accepted Answer

hollow area in the sediment that shows the shape of a fossil

Question 11

What are the different types of fossils?

Accepted Answer

mold, cast, trace fossil, carbon film, and petrified fossil

Question 12

An Index fossil must be...

Accepted Answer

recognized, widespread, lived limited time

Question 13

What is the principle of folding?

Accepted Answer

always happens AFTER the layers have been deposited.

Question 14

What era is often called the Age of Reptiles?

Accepted Answer

Mesazoic Era

Question 15

These kind of fossils are marks of evidence of the activities of an organism?

Accepted Answer

Trace

Question 16

The Precambrian time is divided into 3 long units which are?

Accepted Answer

Paleozoic, Mesozoic, Cenozoic

Question 17

What is a geological time scale?

Accepted Answer

units of time that divides Earth's history, 4 subdivisions

Question 18

What is the absolute age of a rock?

Accepted Answer

number of years since formed

Question 19

"I am younger than my identical twin." Is what?

Accepted Answer

Relative time

Question 20

What is radioactive dating?

Accepted Answer

absolute ages of rock, by amount of radioactive element

Question 21

What is an extrusion?

Accepted Answer

lava hardens on the surface

Question 22

This is the oldest era divided into 6 periods

Accepted Answer

Paleozoic Era

Question 23

What is an element?

Accepted Answer

all the atoms of a particular type of matter are the same

Question 24

What is law of unconformities?

Accepted Answer

missing rock layers show missing time, wavy line

Question 25

Humans live in what era, epoch, and period?

Accepted Answer

Cenozoic Era, Holocene epoch, Quaternary period

Question 26

What is extinct?

Accepted Answer

when an organism no longer exists and never will again

Question 27

What is time?

Accepted Answer

a part of the measuring system used to put events in order

Question 28

When time is measured in some unit such as seconds, hours, or years this is?

Accepted Answer

Absolute

Question 29

When two or more events are compared without a numerical reference?

Accepted Answer

Relative

Question 30

What is evolution?

Accepted Answer

gradual change in living things over long periods of time

Question 31

Information gathered by paleontologists are called what?

Accepted Answer

fossil record

Question 32

Eras are divided into _____ which geologists name from places around the world

Accepted Answer

periods

Question 33

What is the law of superposition?

Accepted Answer

when the oldest rock layer is on the bottom, younger on top

Question 34

To determine relative age of rocks, geologists also study the following:

Accepted Answer

extrusions, intrusions, fault, and uncomformity

Question 35

This is the middle era divided into 3 periods

Accepted Answer

Mesozoic Era

Question 36

What era is often called the Age of Amphibians?

Accepted Answer

Late Paleozoic Era

Question 37

What is Precambrian Time?

Accepted Answer

covers 88% of Earth's history, ended 544 million yrs ago

Question 38

What is a fossil?

Accepted Answer

preserved remains of living things and buried in rock layers

Question 39

Blue green algae, added oxygen to the atmosphere through photosynthesis, first form of life.

Accepted Answer

cyanobacteria

Question 40

What is half-life?

Accepted Answer

time required for half of the unstable element to decay

Question 41

What is a petrified fossil?

Accepted Answer

fossils in which minerals replace all or part of organism

Question 42

What is a cast?

Accepted Answer

a solid copy of the shape of an organism

Question 43

The fossil record provided evidence to support what theory?

Accepted Answer

theory of evolution

Question 44

What era started 65 million years ago to present?

Accepted Answer

Cenazoic Era

Question 45

What is often called the Age of fishes?

Accepted Answer

Middle Paleozoic Era

Question 46

What is a paleontologist?

Accepted Answer

scientists who study, collect, and classify fossils

Question 47

What is law of inclusions?

Accepted Answer

pieces of rock found in other layers, ALWAYS older

Question 48

What are epochs?

Accepted Answer

divided periods seperated by difference in life forms

Question 49

What is the law of uniformitarianism?

Accepted Answer

the present is the key to the past.

Question 50

What is a fault?

Accepted Answer

break in Earth's crust which is younger than the rock layer

Question 51

What are eons?

Accepted Answer

longest subdivision

Question 52

What is the law of cross-cutting?

Accepted Answer

anything cutting across a rock layer is younger

Question 53

What is unconformity?

Accepted Answer

gap in record where some rock layers have been lost

Question 54

what are carbon films?

Accepted Answer

extremely thin coating on rock

Question 55

What is radioactive decay?

Accepted Answer

one unstable element breaks down into stable element

Question 56

This is the youngest era divided into 2 periods

Accepted Answer

Cenozoic Era

Question 57

What is the relative age of a rock?

Accepted Answer

the age compared with ages of other rocks

Fossils/Geological time/Relative,Absolute time- Knoxville

Questions 57

Fossils/Geological time/Relative,Absolute time- Knoxville

Questions 57