Type
Crossword
Description

a scientist who specializes in the study of life forms that existed in previous geologic periods, as represented by their fossils paleontologist
any pieces, scraps, fragments, etc, that are left unused or still extant, as after use, consumption, the passage of time remains
to keep alive or in existence preserve
rock that has formed through the deposition and solidification of sediment, especially sediment transported by water, ice, and wind. sedimentary
any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc. fossil
a fossilized track, trail, burrow, boring, or other structure in sedimentary rock trace
Material filling in a cavity left by a organism that has dissolved away cast
group of fossils which has been analyzed and arranged chronologically fossil record
formed from an organism moving in some way, leaving behind a trace or track Imprint fossils
fossilized tree resin amber
the process by which organic matter exposed to minerals over a long period is turned into a stony substance. petrification
the termination of a kind of organism or of a group of kinds extinct
fossilized feces coprolite

Fossils Crossword

Type
Crossword
Description

An imprint made by sediment filling a mold and creating the same shape as the once living organism. cast
Fossils of the actual animal or animal part preserved in ice, amber, or tar. True Form fossils
Formed when an organism dies, breaks down, and only leaves a thin layer of carbon. carbon film fossil
Substances such as coal, natural gas, and oil formed from the remains of once living organism. Fossil fuels
material that is replaced quickly in nature, alternative source of energy. Renewable resources
The preserved remains or traces of animals, plants, and other organisms of long ago. fossils
to turn into stone or a stony substance. Petrify
Rocks made from material that sinks to the bottom of a liquid such as a lake, pond, or ocean. sedimentary
Person who studdies fossils. Paleontologist
Impressions left behind by an oganism; they record the movements and behaviors. trace fossils
an imprint made by the outside of a dead plant or animal when water washes the remains out of the rock. mold
Hardened tree sap yellow to brown in color, that is often a source of insect fossils. amber
A fossil made by a print or an impression. imprint
An organism no longer alive on Earth. extinct

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

fossils Crossword puzzle

Type
Crossword
Description

what is a remains of an organism that lived long ago and is preserved in some way? fossil
a scientist who studies fossils and organisms that lived long ago? paleontologist
a mark or figure impressed or printed on something imprints
formed when sediment fills the inside or covers the outside of a dead organism molds
preserves the impression of the hard part of an organism casts
insect fossils preserved in hardened tree sap called amber
are formed by sediment that is deposited over time, usually as layers at the bottom of lakes and oceans sedimentary rock
is a kind of fossil formed when trees that died millions of years ago fell and became covered in mud and sand petrified wood
when the last existing member dies extinct
are a diverse group of animals that first appeared during the Triassic dinosaurs

Geologic Time and Rock layer Crossword

Type
Crossword
Description

A fossil of an organism that had wide geographic distribution but existed on Earth for a relatively brief period of time Index fossil
Plate converging together and folding in on each other. Folding
Rock layers in the bottom or oldest, rock layers are added on top are younger. Superposition
Absolute dates usually determined by radiometric dating methods on appropriate rock layers or types. Absolute dating
Sediments are deposited in flat lying horizontal layers that are parallel to the surface on which they are deposited. Uniformitarianism
surface processes (water flow or wind) that remove soil, rock, or dissolved material from one location on the Earth's crust, then transport it away to another location. Erosion
Cracks in rock layers that slip releasing energy vibrations. Faulting
magma shooting through rock layers and cooling underground. Intrusions
The trace or remains of an organism that lived long ago most commonly preserved in sedimentary rock. Fossil
rock that has formed from sediment deposited by water or air. Sedimentary

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

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

tectonic plate boundaries Crossword

Type
Crossword
Description

this scientist had the theory of the continental drift alfred
two plates slide against each other in a sideways motion transform
a line on a rock surface or the ground that traces a geological fault faultline
changed by extreme heat and pressure to form another rock metamorphic
places where the sea floor spreading takes place midoceanridge
a tall mountain that with a lot of pressure shoots out hot lava volcano
formed by deposition and solidification pf sediments sedimentary
a violent shaking of the ground caused by tectonic plates earthquakes
piece of the crust that floats on the mantle tectonic
hot fluid or semi fluid material within the earth's crust magma
two plates are moving away from one another divergent
formed by cooling and solidification of magma or lava igneous
made of iron, with small amount of nickle core
technical name for the crust and mantle lithosphere
remains of a prehistoric organism preserved in a mold form in a rock fossils
two plates move toward one another and collide convergent
contains most of earths mass (hints: its hot) mantle
hot molten or semi fluid rock erupted from volcano lava
a long high sea wave caused by earth quakes tsunami
outermost later of the planet, with life crust

Geologic History Crossword

Type
Crossword
Description

the preserved remains or traces of living things - a fossil type Fossil
a hollow area in sediment in the shape of an organism or part of an organism - a fossil type Mold
a hollow area in sediment in the shape of an organism or part of an organism - a fossil type Cast
fossils in which minerals replace all of an organism or part of an organism such as a dinosaur bone - a fossil type Petrified Fossil
an extremely thin coating of carbon on rock - a fossil type Carbon Film
provides evidence of the activities of ancient organisms - a fossil type Trace Fossil
a process that preserves entire organisms, i.e. tar, tree resin, freezing - a fossil type Preserved Remains
scientists that study fossils Paleontologist
the number of years that have passed since a rock formed Absolute Age
the age of a rock compared to other rocks, i.e. older or younger than Relative Age
when an organism no longer exists and will never again on earth Extinct
to determine the relative age of a rock. It states that in undisturbed horizontal sedimentary rock layers the oldest is at the bottom Each higher layer is younger than the one below it Law of Superposition
a fossil that is widely distributed and and in existence for a relatively short period in geologic history. They are useful because they tell tell the relative age of the rock in which they are found Index Fossil
a gap in the geological record that shows where rocks are lost due to erosion/ folding, etc... Unconformity
it is the time it takes for a radioactive element for half of the elements to decay Half-Life
elements that release particles of energy and they beak down or decay over time. Atoms of one element break down to form atoms of another element Radioactive Decay
the time period between the Pre -Cambrian and present time period; Paleozoic, Mesozoic and Cenozoic Eras
Eras that are subdivided. Many of the names come from places where fossils were discovered Periods
the key principle that guides scientists when they make inferences about Earth's past and is states that the geologic processed that operate today also operated in the past Uniformitarianism

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

The formation of Sedimentary Rocks Crossword

Type
Crossword
Description

the number equivalent to the product of a thousand and a thousand; 1,000,000 or 106. Millions
take or carry (people or goods) from one place to another by means of a vehicle, aircraft, or ship. Transport
(of rock) that has formed from sediment deposited by water or air. Sedimentary
resolve or reach an agreement about (an argument or problem). Settle
the accumulation of sand and dirt that settles in the bottom of lakes. Sedimentation
a layer of a mineral, metal etc that is left in soil or rocks through a natural process Deposit
the consolidation of sediments resulting from the weight of overlying deposits. Compaction
the binding together of particles or other things by cement. Cementation
a minute portion of matter. Particles
the outside part or uppermost layer of something (often used when describing its texture, form, or extent) surface
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock. Fossils