Type
Word Search
Description

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

Earth History #1 Crossword

Type
Crossword
Description

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

Geologic Time and Rock Layer Crossword

Type
Crossword
Description

A body between to igneous rocks without reaching the surface. Intrusions
To elevate a piece of land. Uplift
The relative order of past events. Relative Dating
To move in a sloping position. Tilting
A theory that describes a challenging concept about the nature and behavior Superposition
A fossil that is useful for dating Index Fossil
Rocks that formed from lava on the surface of the earth. Extrusions
A method of dating geological rocks or fossils. Radiometric Dating.
A surface of contact between two groups of unconformable strata. Unconformity
when one or a stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved Folding
the process of determining an age on a specified time scale in archaeology and geology. Absolute Dating
The theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes. Uniformitarianism
A rock layer that is split due to this. Faulting
The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock. Fossil
A rock that has formed from sediment deposited by water or air. Sedimentary
The process by which soil and rock particles are worn away. Erosion

Geologic Time and Earth's History Crossword

Type
Crossword
Description

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

Absolute Dating Word Search

Type
Word Search
Description

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

Geologic Time Word Search

Type
Word Search
Description

absolute-age dating
correlation
cross-cutting relationship
dendrochronology
eon
epoch
era
fossil
geologic time scale
granite
groundwater
half-life
isotope
key bed
mass extinction
original horizontality
period
Precambrian
principle of inclusions
radioactive decay
radiocarbon dating
radiometric dating
relative-age dating
superposition
unconformity
uniformitarianism
varve

7 chapter 5 vocabulary Word Search

Type
Word Search
Description

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

CLUES TO EARTHS PAST Crossword

Type
Crossword
Description

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

Geologic Time/Fossils Word Search

Type
Word Search
Description

Evolution
Index Fossil
Unconformity
Law of Superposition
Trace Fossil
Cast
Molds
Petrification
Fossil
Absolute Age
Relative Age
Cenozoic
Mesozoic
Paleozoic
Precambrian
Geologic Time

Changes Over Time Vocabulary Crossword

Type
Crossword
Description

A group of similar organisms that can mate with each other to produce a fertile offspring. Species
The preserved remains or traces of an organism that lived in the past. Fossil
A trait that helps an organism survive. Adaptation
The gradual change in a species over time. Evolution
A well-tested concept that explains a wide range of observations. Scientific Theory
The process of which individuals that are better adapted to their enviorment and are more likely to survive and reproduce than other members of the same species. Natural Selection
Any difference between individuals of the same species. Variation
Similar structures that related species have inherited from a common ancestor. Homologous Structures
A diagram that shows how scientists think different groups of organisms are related. Branching Tree
Gradually, the minerals replace the remains, changing them into rock Petrified Fossils
A hollow space in sediment in the shape of an organism or part of an organism. Mold
A copy of the shape of an organism that made the mold. Cast
To determine which of the two fossils are older Relative Dating
Allows scientists to determine the actual age of fossils Radioactive Dating
Unstabe elements that decay or break down into different elements. Radioactive Elements
Of a radioactive element it is the time it takes for half of the atoms in a sample to decay Half Life
The fossils that scientists have collected. Fossil Record
When no members of a certain species is alive. Extinct
Purposes that evolution occurs slowly but steadily. Gradualism
A theory that accounts for the gaps in a fossil record. Punctuated Equilibria

Paleontology Word Search

Type
Word Search
Description

catastrophic
classification
asphalt
tar pits
paleontologist
pangaea
relative age
geologic time scale
natural selection
amber
trace fossil
geologic periods
uniformitarianism
ancestry
species
petrification
cenezoic
geologic era
original horzontallity
stimili
evolution
cast
extinction
index fossil
superposition
reproduce
biodiversity
mold
extinct
absolute age
fossils