Type
Crossword
Description

This crossword contains the following questions and answers:

indicates that one layer is older or younger than another layer, but does not indicate age in specific years RELATIVE AGE
the rocks age is in specific years ABSOLUTE AGE
helps determine relative age INDEX FOSSILS
helps find absolute age RADIOMETRIC DECAY
how long it takes half the parents mass to convert to the daughter isotope. HALF LIFE
the original radioactive isotope parent isotope
the newly formed isoptope daughter isotope
parent isotope minus carbon dating C14
what does daughter isotope equal N14
one of the requirements for index fossils DISTINGUISHABLE FEATURES

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Absolute Dating Word Search

Type
Word Search
Description

This word search contains the following answers:

ABSOLUTE DATING
AGE
DAUGHTER ISOTOPE
FOSSILS
HALF-LIFE
INDEX FOSSILS
METEORITE
ORGANISMS
PARENT ISOTOPE
POTASSIUM DATING
RADIOACTIVE DECAY
RADIOACTIVE ISOTOPES
RADIOCARBON DATING
RADIOMETRIC DATING
TROPITES FOSSILS
URANIUM-LEAD DATING

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SUPER SCIENCE WORDSEARCH unit 7---- (can you find all the words?)

Type
Word Search
Description

This word search contains the following answers:

absolute dating
cast
decay element
extinct
extrusion
fossil record
geologic column
geologic time
half-life
ice core
index fossil
isotope
mold
petrified
radioactivity
radiometric dating
strata
trance fossil
unconformity
uniformitarianism

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CLUES TO EARTHS PAST Crossword

Type
Crossword
Description

This crossword contains the following questions and answers:

Remains, imprints, or traces of prehistoric organisms. Fossil
Remains of species that existed on Earth for a short period of time. Index Fossil
The time taken for any specified property to decrease by half. Half-Life
Living thing such as animal, plant and human. Organism
Somethings age, to the comparison to the ages of other things. Relative Age
A thin film of carbon residue is left, forming a silhouette of the original organism Carbon Films
A hard part of something being dissolved and leaving behind a cavity. Mold
Gaps in rock sequences are called _____________. Unconformities
The solid, nonmetallic mineral matter of which rocks are made of. Stone
The age, in years, of a rock or other object. Absolute Age
A method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample. Radiometric Dating
A fossil of a footprint, trail or burrow. Trace Fossil
Belonging to or forming the outer surface or structure of something. External
Sometimes conditions allow ________ _________ of organisms to be preserved for millions of years. Original Remains
A scientist who studies fossils. Paleontologist
Plant matter accumulating, over millions of years, these deposits become completely carbonized, forming ____. Coal
The process in which something is being broken down. Radioactive Decay
A person, animal, or group living in a place or environment. Inhabited
Rock formed when sediments are cemented and compacted. Sedimentary Rock
An expert in or student of geology. Geologist

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Earth History #1 Crossword

Type
Crossword
Description

This crossword contains the following questions and answers:

earliest era of earth history, ending 570 million years ago Precambrian
a core sample that is typically removed from an ice sheet ice core
between the end of the Precambrian eon and the beginning of the Ordovician period. Cambrian
the state or process of a species, family, or larger group being or becoming extinct. "the extinction of the great auk" extinction
a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers Law of superposition
a system of chronological dating that relates geological strata to time Geological time scale
any method of determining the age of earth materials or objects of organic origin based on measurement of short-lived radioactive elements radioactive dating
a fossil that is useful for dating and correlating the strata in which it is found Index fossil
process of determining an age on a specified chronology in archaeology and geology Absolute dating
the remains or impression of a prehistoric organism preserved in petrified form fossil
the science of determining the relative order of past events relative dating
the outermost layer of a planet crust

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Geologic Time and Earth's History Crossword

Type
Crossword
Description

This crossword contains the following questions and answers:

A time when many species such as humans came to be. CenozoicEra
A global extinction that causes at least 80% of a species to die. K-T Extinction
A tool used to relate geological events to time. Geologists often use this. Geologic Time Scale
The earliest period of Earth's history. Precambrian Time
The largest section of geological time. Eon
The era when dinosaurs were alive. Mesozoic Era
A span of time defined by large events. Era
One of the subdivisions on the geological time scale. Also a punctuation mark. Period
The second smallest division in geologic time. Epoch
The extinction of dinosaurs happened within this era. Paleozoic Era
Measurement of age in exact years. Absolute age
The isotope that undergoes radioactive decay in a nuclear reaction. Parent Isotope
Unchanged fossil remains from extinct or dead animals. Original Remains
A buried surface seperating two rock masses of different ages. Uncomformity
The product atom formed during radioactive decay in a nuclear reaction. Daughter Atom
A technique used to date materials such as rocks or carbon. Radioactive dating
States that the oldest rocks will be at the bottom and will have formed first. Law of Superposition
Rings on a tree trunk representing a single year's growth with each line. tree rings
The remains or impression of a prehistoric organism. Fossil
The age of something in relation to something else. Relative Age
A fossil that is used for dating and correlating the strata in which it is found. Index fossil
A fossil of a footprint rather than the animal itself. trace fossil
A core sample typically removed from an ice sheet. Ice Cores
A fossil found in rock that was created long after the animal of it died. Rock Fossil
the time taken for a radioactive isotope to fall to half of its original value. Half-life

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Relative and Absolute Dating Crossword

Type
Crossword
Description

This crossword contains the following questions and answers:

What do scientists use to measure artifacts under 30,000 years of age? C-14
In order to date old materials, scientists use? Abosolute dating
The half-life of Carbon-14 is 5730
If I were to measure a dinosaur fossil which element should I use? Uranium 238
What is the method used to date fossils from that can be miles away from eachother? Rock Correlation
What is the contact between sedimentary rocks that are significantly different in age, or between sedimentary rocks and older, eroded igneous or metamorphic rocks? Uncomformity
Any remains, impression or trace of a living thing from a former geological era. Fossil
samples of Earth and rock nearest the surface will be newer in age than those beneath them. Law of Superposition
No element can date me accurately what rock am I Sedimentary Rock
What is a technique used to find materials such as igneous or gas? Radiometric Dating

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Natural Selection Crossword

Type
Crossword
Description

This crossword contains the following questions and answers:

the period between the birth of one generation and the birth of the next generation generation time
the formation of new species as a result of evolution speciation
the process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do natural selection
a characteristic that improves an individuals ability to survive and reproduce in a particular environment adaptation
a group of organisms that are closely related and can mate to produce fertile offsring Species
the process in which inherited characteristics within a population change over generations such that new species sometimes arise Evolution
the trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock fossil
a historical sequence of life indicated by fossils found in layers of the earths crust fossil record
a genetically determined characteristic trait
the human practice of breeding animals or plants that have certain desired traits selective breeding
any method of determining whether an event or object is older or younger than other events or object relative dating
any method of measuring the age of an object or event in years absolute dating
the theory that explains how large pieces of the Earths outermost layer, called tectonic plates, move and chage shape plates tectonics

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7 chapter 5 vocabulary Word Search

Type
Word Search
Description

This word search contains the following answers:

uniformitariansm
radiometric dating
half-life
radioactive decay
absolute age
unconformities
relative age
principle of superposition
index fossils
mold
cast
carbon film
Permineralized remains
Fossils

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Earth's History Crossword

Type
Crossword
Description

This crossword contains the following questions and answers:

The process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element Radioactive Decay
States that layers of sedimentary rocks, younger rocks normally lie on top of older rocks if the layers have not been disturbed Law of superposition
Any method of measuring the age of an event or object in years Absolute dating
Atom of a substance that has the same number of protons but a different number of neutrons as another atom of the same substance Isotope
Fossilized mark that formed in sedimentary rock by the movement of an animal on or within soft sediment Trace fossil
Very long period of time the Earth has existed Geologic Time
Break in the geologic record created when rock layers are eroded or sediment is not deposited for a long period of time Unconformity
Idea that geologic processes that occurred in the past can be explained by current geologic processes Uniformitarianism
Method of determining the absolute age of an object by comparing the relative percentages of a radioactive parent isotope and a stable daughter isotope Radiometric dating
Amount of time required for half of an original sample of radioactive material to decay or undergo radioactive transformation Half life
Any method of determining whether an event or an object is older or younger than other events or objects Relative dating
Stable element into which a radioactive element breaks down Decay element
Remains or traces of past plants or animal life that has been preserved in sedimentary rock Fossil
Fossil that is used to establish the age of a rock layer because the fossil is distinct, abundant, and widespread, and the species that formed the fossil existed for only a short span of geologic time Index fossil
A historical sequence of life indicated by fossils found in layers of the Earth's crust Fossil record

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Earth History Crossword

Type
Crossword
Description

This crossword contains the following questions and answers:

Which period ended 570 million years ago? Precambrian
What was the first geological period in the Paleozoic Era Cambrian Period
which scientific law says that the youngest of rocks layer is on top and the oldest is n the botom superposition
which method to determine the age of earth materials uses radioactive elements Radioactive dating
the determination of the age of an object with reference to a specific time scale is Absolute dating
The arrangement of artifacts to determine the age of that object Relative dating
the largest division of geologic time Eon
a period of time marked by a specific Characteristic Era
a point of time distinguished by a particular event Epoch
A large specified portion of time Period
a molten fluid rock that comes out of a volcano Lava
A molten material beneath the earths crust Magma
A vent in the earths crust through which lava Volcano
The two sub-layers of the earth's crust that move and float Tectonic plate
the surface of the earth is broken up into ___________ Plates
a planar fracture Fault
the study of earth is ____________ Geology
the process of witch the surface of the earth is being eroded Erosion
the chemical processes that cause exposed rock to decompose Weathering
organic matter deposited by water, sediment
the state of being deposited or precipitated Deposition
lift up, raise or elevate. Uplift
a process in which new ocean floor is created Seafloor spreading
any of several seismically active submarine mountain Midocean ridge
Rock that has formed through the deposition of sediment Sedimentary rock
Rocks formed by the solidifying of molten materials. Igneous rock
Rock that was once one kind of rock but has changed to another under the influence of heat Metamorphicrock
a process by which rocks are created Rock cycle
the outer layer of the earth Crust
an remaining of a living thing as a skeleton or imprint Fossil
a widely distributed fossil index fossil

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