Ch. 3 The Rock and Fossil Record Review

Which of the following words describes change according to the principle of uniformitariansim? Sudden Rare Global Gradual 25 of 27

Scientists who study past life including fossils of plants and animals are called . . . 25 27 Archeologists Anthropologists Uniformitarianists Paleontologists

Determining whether an object is older or younger than other objects is called . . Relative dating Superposition Absolute dating Geologic dating 25 of 27

Molten rock that squeezes into existing rock and cools is called Fold Fault Intrusion Unconformity 24 of 27

Fossils are most often preserved in Ice Rock Amber Tar pits 24 of 27

A cavity in rock where a plant or animal was buried is called Cast Mold Imprint Trace fossil 25 of 27

What is an index fossil? A naturally preserved fossil that shows evidence of animal activity. Tracks, burrows, nests of extinct animal. A fossil of an organism that lived during a relatively short well-defined time span. A fossil that represents a missing part of the geologic column 21 of 27

Erosion and nondeposition cause Folding Cross cutting Intrusions Unconformities 22 of 27

All of the following are types of unconformities EXCEPT . . . Angular unconformities Anticonformities Disconformities Nonconformities 20 of 27

Which of the following is in the correct order from largest to smallest amounts of time? Eon, era, period Epoch, era, period Epoch, period, era Period, era, eon 21 of 27

The Cretaceous, Jurassic and Triassic time periods were in what era? 23 27 Cenzoic Paleozoic Phanerozoic Mesozoic

Which of the following were NOT in the Paleozoic Era? Permian Archeon Silurian Ordivician 22 of 27

What eon, era and period do we live in? Proterzoic, Cenozoic, Tertiary Phanerozoic, Cenozoic, Quarternary Paleozoic, Quarternary, Tertiary Hadeon, Phanerozoic, Quarternary 20 of 27

The principle that outlines how rocks like undisturbed sequences with the older rocks on the bottom is called . . . Relative dating Radiometric dating Superposition Law of cross cutting 22 of 27

An unstable isotope is called the . . Son isotope Daughter isotope Grandparent isotope Parent isotope 0 of 27

Of the following isotopes, which is stable? uranium-238 carbon-12 potassium-40 carbon-14 25 of 27

Which method of radiometric dating is used mainly to date the remains of organisms that lived within the last 50,000 years? carbon-14 dating potassium-argon dating uranium-lead dating rubidium-strontium dating 21 of 27

The largest divisions of geologic time are called . . . 20 27 Periods Eons Eras Epochs

To determine the most accurate and precise age of Earth’s oldest rocks, geologists would use Relative dating The uranium-lead method The carbon-14 method Index fossils 20 of 27

Which of the following processes always occurs at a steady rate? Erosion Decay of organic matter Sediment deposition Radioactive decay 19 of 27

Which of the following is correct from oldest to youngest? 3, 1, 6, 5, 4, 2 2, 4, 5, 3, 6, 1 4, 5, 2, 3, 6, 1 5, 4 , 2, 6, 1, 3 24 of 27

If a rock started with 260 g of potassium and 0 g of argon and had a half life of 10 years, how much potassium would be left after 4 half lives? 40 years 54 grams 32.5 grams 16.25 grams 21 of 27

If after 3 half lives there was only 8 grams of parent carbon 14 left, how much carbon was there to start with if the half life of carbon is 5,715 years long? 1 gram 64 grams 17,415 years 32 grams 21 of 27

How many years would it take for a 120 kg of a radioactive isotope to decay to 3.75 kg if the half life for that isotope was 3 years? 15 years 12 years 40 years 32 years 20 of 27