CHAPTER FIVE SECTION 2

ROCK FORMATION IGNEOUS

IGNEOUS WHEN MELTED ROCK COOLS AND FORMS SOLID ROCK. MAGMA- MELTED ROCK INSIDE THE EARTH VERRRRRYYYYY HOTTTTTTTTTTTTTT LAVA MELTED ROCK THAT COMES OUT OF THE CRUST A GOOD EXAMPLE IS GRANITE

SEDIMENTARY LITTLE PIECES OF BROKEN ROCK THAT ARE DRIED OUT AND SQUISHED TOGETHER USUALLY WATER CARRIES LITTLE PIECES OF ROCK FROM MOUNTAINS ON IT’S WAY TO THE OCEAN .THE RIVER SLOWS AND THE PIECES FALL OUT. AN ANIMAL MIGHT DIE AND SINK INTO THE ROCK AND BECOME A FOSSIL

FOSSILS TYPES OF FOSSILS PETRIFIED – WHEN THE MINERALS IN THE LITTLE ROCKS REPLACE THE ORGANISM MOLD- A HOLLOW SPACE WHERE AN ORGANISM WAS BEFORE IT TOTALLY DECAYED CAST- When a hollow mold fills up and takes the shape of the organism Preserved remains- When an organism falls into ice and is flash frozen or Falls into a tar pit- no oxygen available to decay the organism

METAMORPHIC WHEN ROCK IS IN THE CRUST SOMETIMES IT CHANGES INTO ANOTHER TYPE OF ROCK. WHAT TWO FORCES MIGHT ACT ON THE ROCK TO CHANGE IT ( WHAT HAPPENS AS WE GO DEEPER INTO THE CRUST) PRESSURE FROM ALL THE ROCK ON TOP OF IT HEAT- FROM GETTING CLOSER TO THE MAGMA

DETERMINING A FOSSIL’S AGE RELATIVE DATING- THE AGE IS DETERMINED BY WHERE IT IS FOUND ON TOP – IT IS THE NEWEST ON THE BOTTOM- IT IS THE OLDEST

DETERMINING A FOSSILS AGE ABSOLUTE DATING WHEN WE USE RADIOACTIVE MATERIAL TO DETERMINE A FOSSIL’S AGE

MATERIAL X TAKES 1000 YEARS FOR IT’S HALF LIFE TO DECAY INTO MATERIAL Y HOW OLD 10 GRAMS 0 GRAMS 5 GRAMS 2.5 GRAMS 7.5 GRAMS

WHAT DO FOSSILS REVEAL FOSSIL RECORD WHEN WE COMBINE ALL THE FOSSILS WE HAVE FOUND EXTINCT WHEN WE CANNOT FIND ANY LIVING MEMBERS OF A SPECIES

HOW FAST DOES EVOLUTION OCCUR GRADUALISM PUNCTUATED EQUILIBRIA WHEN A SPECIES CHANGES OVER MANY YEARS IN REPONSE TO A GRADUAL CHANGE IN THE ENVIRONMENT. WHEN A PECIES CHANGES RAPIDLY TO A RAPID CATASTROPHIC CHANGE IN THE ENVIRONMENT

WHICH ONE IS TRUE - WHY GRADULISM BECAUSE THE FOSSIL RECORD PUNCTUATED EQUILIBRIA BECAUSE THE FOSSIL RECORD

SECTION REVIEW 1. DESCRIBE THE FOUR WAYS THAT FOSSILS FORM IN SEDIMENTARY ROCK . CAN FOSSILS FORM IN IGNEOUS OR METAMORPHIC ROCK- WHY 2. EXPLAIN RELATIVE AND ABSOLUTE DATING. HOW DOES ABSOLUTE DATING WORK? 3. WHAT IS THE FOSSIL RECORD? HOW DO GRADUALISM AND PUNCTUATED EQUILIBRIA EXPLAIN THE FOSSIL RECORD.