Matching Pairs EARTH'S HISTORYOnline version MATCH THE DEFINITIONS by Clara Beltran 1 Sedimentary, metamorphic, igneous rocks. 2 Modifications in successive generations. 3 TECHNIQUE USED TO DATE MATERIALS SUCH AS ROCKS. 4 Rock type that is usually made of sand, clay, pebbles or sometimes shells cemented together, often find in layers. 5 People who study fossils. 6 Evidence that and organism once existed in an area. 7 Extremely old. 8 Any individual living thing. FOSSIL RADIOMETRIC DATING SEDIMENTARY ROCK ORGANISM PALEONTOLOGISTS EVOLUTION TYPES OF ROCKS ANCIENT