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TIMESCALE

FOSSILSTRACES

OF ORGANISMS

SCIENTISTS ROCK ITOUT

THE GEOLOGIC TIME SCALE IS LIKE THIS FOR GEOLOGISTS

WHAT IS A CALENDAR?

ERAS ARE DIVIDED INTO THESE

WHAT IS A PERIOD?

THIS ERA IS MISSING:PRECAMBRIAN, PALEOZOIC,

CENOZOIC

WHAT IS MESOZOIC?

THE PERIOD OF TIME WE LIVE IN

WHAT IS THE QUATERNARY PERIOD?

THERE ARE THIS MANY PERIODS OF TIME

WHAT IS ELEVEN?

REMAINS OF ORGANISMS ARE DRYED OUT BY THIS

FOSSILIZATION PROCESS

WHAT IS MUMMIFICATION?

HARDENED TREE SAP IS THIS WHICH FOSSILIZES ORGANISMS CAUGHT IN IT

WHAT IS AMBER?

DAILY DOUBLE!!!!!!!!

FOOTPRINTS ARE AN EXAMPLE OF THESE

WHAT ARE TRACE FOSSILS?

THESE FOSSILS CAN BE USED TO STUDY THE EATING HABITS

OF ANCIENT ANIMALS

WHAT ARE COPROLITES?

ORGANISMS WHO LIVED A BRIEF PERIOD OF TIME AND

LEFT THEIR FOSSILS INSEDIMENTARY LAYERS

WHAT ARE INDEX FOSSILS?

MOLDS FILLED WITH

SEDIMENTS

WHAT ARE CASTS?

STONES SOME DINOSAURS HAD IN THEIR DIGESTIVE

SYSTEMS

WHAT ARE GASTROLITHS?

TAR PITS THAT FOSSILIZE ANIMALS

ARE MADE OF THIS.

WHAT IS PETROLEUM?

A FOSSILIZED WING OF AN INSECT IS AN EXAMPLE

OF THIS.

WHAT IS A TRACE FOSSIL?

THIS RETAINS THE SHAPE AND SURFACE

MARKINGSOF THE

ORIGINAL ORGANISM.

WHAT IS A MOLD?

THESE SCIENTISTS STUDYFOSSILS TO LEARN ABOUT

EARTH’S PAST.

WHO ARE PALEONTOLOGISTS?

HE IS RESPONSIBLE FOR THE THEORY OF NATURAL

SELECTION.

WHO IS CHARLES DARWIN?

SCIENTISTS WHO STUDY GEOLOGY

WHO ARE GEOLOGISTS?

JAMES HUTTON WAS ASCIENTIST WHO STUDIED

THE SHORES OF SCOTLAND AND DISCOVERED

THIS ABOUT THE EARTH.

WHAT IS “VERY OLD”?

SCIENTISTS USE RADIOMETRICDATING TO DETERMINE THIS

KIND OF AGE OF ROCK.

WHAT IS ABSOLUTE AGE?

SEDIMENTARY ROCK LAYERS OLDER THAN THE LAYERS

ABOVE IT AND YOUNGER THAN THE LAYERS BELOW IT IS DUE

TO THIS LAW.

WHAT IS THE LAW OF SUPERPOSITION?

SEDIMENTS DEPOSITED INLAYERS FORM THIS KIND

OF ROCK.

WHAT IS SEDIMENTARY?

SOMETIMES ROCK LAYERSGET OVERTURNED OR

FOLDED DUE TO THESE STRONGEARTH FORCES.

WHAT IS TECTONIC ACTIVITY?

IN LAYERS OF UNDISTURBED ROCK, THE OLDEST

SEDIMENTARYROCKS ARE HERE.

WHAT IS THE BOTTOM?

ROCK LAYERS AREDISTINGUISHED FROM EACH

OTHER BY THESE THAT THEY CONTAIN.

WHAT ARE INDEX FOSSILS?