Review - Relative Dating and The Geologic Timescale

Master relative dating and the geologic timescale with our review worksheet!

1) Sequence the layers from oldest (1) to youngest (13). 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 1 2 3 4 5 6 8 7 9 10 11 12 13 2) Sequence the layers from oldestto youngest. OLDEST Q Then comes... O Then comes... N Then comes... M Then comes... L Then comes... P Then comes... H Then comes... I Then comes... J YOUNGEST K 3) Which law is being represented in the image below? Law of Original Horizontality Law of Cross-cutting Concepts Law of Superposition Law of Folding Official Geologic Timescale 4) When did the earliest dinosaurs live? Mid Ordovician Palaeozoic Early Cretaceous Mesozoic Mid TriassicMesozoic Pliocene Neogene Cenozoic 5) Which organisms emerged in thelate SilurianPalaeozoic? earliest insects earliest grasses earliest fishes earliest birds 6) Fill in the blanks with the words to make the sentences true. The Paleozoic era began 542 million years ago and ended 251 million years ago. Fish, insects and reptiles emerged in this era. The Mesozoic era spanned from 251 million years ago to 65.5 million years ago. Dinosaurs, mammals and birds dominated this era. The Cenozoic era began 65.5 million years ago and is still happening today. Carnivorous mammals and humans have emerged in this time period. 7) Match the eras with the organismsthat lived in them. Paleozoic Mesozoic Cenozoic 8) Which is the index fossil? 9) Place the events in their appropriatetime period. Cambrian Earliest fishes Earliest trilobites Silurian Earliest insects Earliest land plants and animals Triassic Earliest dinosaurs Earliest mammals 10. What is NOT true about the jurassic period? It began 200 million years ago and ended 146 million years ago. The earliest birds emerged during this period. It is part of the mesozoic era and phanerozoic eon. It is when the earliest dinosaurs emerged.