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

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

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

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

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

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

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

Clues to Earth's Past Crossword

Type
Crossword
Description

Remains, imprints, or traces if prehistoric organisms that can tell when and where organisms once lived and how they lived. Fossils
Fossils in which the spaces inside are filled with minerals from groundwater. Permineralized remains
Thin film of carbon residue preserved as a fossil. Carbon film
A type of body fossil that forms in rock when an organism with hard parts is buried. Mold
A type of body fossil that forms when crystals fill a mold or sediments wash into a mold and harden into a rock. Cast
Remains of species that existed on Earth. Index fossil
States that in undisturbed rock layers. Principle of Superposition
The age of something compared with other things. Relative age
Gap in the rock layer that is due to erosion or periods without any deposition. Unconformity
Age, in years, of a rock or other object; can be determined by using properties of the atoms that make up materials. Absolute age
Release of nuclear particles and energy from unstable atomic nuclei. Radioactive decay
Time needed for one half of the mass of a sample of a radioactive isotope to decay. Half-life
Process used to calculate the absolute age of rock by measuring the ratio of parent isotope to daughter product in a mineral and knowing the half-life of the parent. Radiometric dating
Principle stating that Earth processes occurring today are similar to those that occurred in the past. Uniformitarianism

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 Fossils Crossword

Type
Crossword
Description

A record of geologic events and life forms in Earth's history Geologic Time
Name for the period of time in Earth's history thats 90% of Earth's time; cellular organisms lived Precambrian
Ancient Life includes cambrian explosions Paleozoic
middle Life age of reptiles Mesozoic
Recent life age of mammals Cenozoic
The age of a rock compared to rock layers Relative age
The numerical age of an object or event, as established by an absolute-dating process, such as radiometric dating Absolute Age
The preserved remains or traces of an organism that lived in the past Fossil
the process by which organic material is turned into stone Petrification
spaces in rocks previously occupied by bones or shells Molds
when fossils fill with sediments/minerals and hardens to take it's shape Cast
a fossil of a footprints, trails, burrow, or other traces of animals Trace fossil
The geologic principle that each layer is older then the one above Law of Superposition
A break in geologic record created when rock layers eroded Unconformity
Fossils of widely distributed organisms that only lived for a short period of time Index Fossil
the gradual change in a species over time Evolution

Relative and Absolute Dating Crossword

Type
Crossword
Description

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