Describe how relative dating of fossils are determined


Ch. 14 Biology Test



Earth's History

Log in Sign up. How can we help? What is your email? Upgrade to remove ads. F Earth is thought to have formed about 4. F The conditions on primitive Earth were very suitable for life. Describe how relative dating of fossils are determined By the end of the Mesozoic, the continents took on their modern shape.

F The first organisms appeared on land between 3. What is the fossilization? The preservation of animals that die, decay and are buried in sediment. What evidence does the fossil record provide? What are the 2 techniques paleontologists use to determine the age of fossils? Relative dating and radiometric dating.

Explain how relative dating works? It determines the age of rocks by comparing them with those in other layers; the layer above the other one is younger. What is the limitation of relative dating? What dating technique is often used by paleontologists to determine the specific age of a fossil? How do scientists use this dating technique to determine the ages of rocks or fossils? Explain the relationship between radioactive decay and half-life. The rate of radioactive decay is measured in half lives.

A half-life is the amount of time it takes for half of the isotope to decay. During which era did dinosaurs evolve and become extinct? During which era did reptiles not dinosaurs first evolve? During which era did modern man evolve? During which era did Pangaea break apart? During which era life first evolve? During which era did flowering plants first evolve? During which era did the first amphibians evolve? When performing radioactive dating, scientist measure the F In the precambrian time, life existed on the land and in the sea.

The largest extinction ever took place at the end of this era. The 6 describe how relative dating of fossils are determined of Earth's early atmosphere. What was the purpose of Miller and Urey's experiments? What did Miller and Urey's experiment lead to? What did Miller and Urey stimulate? Researchers using the technique of Miller and Urey have been able to produce. Living organisms come from other living organisms. Life comes from non-living materials. What change occurred in Describe how relative dating of fossils are determined atmosphere after the evolution of photosynthesizing prokaryotes bacteria?

The evolution of eukaryotic cells. What does the endosymbiotic theory propose? The ancestors of eukaryotic describe how relative dating of fossils are determined lived in association with prokaryotic cells. How often do mass extinctions occur? How many years overdue are we for a mass extinction?

What is life's first coding system? What do scientists think are the closest relatives of Earth's first cells? What happens when the prokaryotes that the eukaryotes try to eat don't digest. It turns into mitochondria. What are the different fossil types? What is a trace fossil? What are molds and casts? What is a petrified or permineralized fossil? What is the original material? F Fossils form igneous or metamorphic rock. What is the law of superposition? What are the two eons of the Geologic time scale?

Precambrian time and phanerozoic eon. What marked the second half of the precambrian time? What occurred in the Cambrian Explosion? When did reptiles appear? What PERIOD did birds evolve? Where is the K-T boundary? Some scientists believe the course of evolution in the Cenozoic era was shaped by What do plate tectonics describe? What does cenozoic mean? What is the primordial soup hypothesis?

If Earth's early atmosphere had a mix of certain gases, organic molecules could've been synthesized for simple reactions involving those gases in early oceans. What could've provided a framework for protein assembly? How old are the earliest fossils? Although archaea are autotrophic, they don't


Dating Rocks with Fossils


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