Chemistry

Chemistry, 24.08.2019 04:30, AnonymousLizard52303

Be able to identify the youngest and oldest rock layers in a model that includes fossils

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Biology, 27.06.2019 14:00, kristieroth1

The diagram below shows an undisturbed rock. a rock sample is shown with four layers marked a, b, c, d from top to bottom. which of the following is true about the fossil found in layer b? it is the oldest among fossils in all other layers. it is the youngest among fossils in all other layers. it has more similarity to fossils in layer a than layer d. it has more similarity to fossils in layer d than layer c.

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Chemistry, 28.08.2019 02:30, kehrieheb9526

Which of the following best explains the law of superposition? a) in rock layers, the oldest layers are at the bottom and the youngest are at the top b) in rock layers, the youngest layers are at the bottom and the oldest are at the top c) due to weathering and erosion, we cannot determine the relative age of rock layers

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Geography, 24.09.2019 06:50, viktoria1198zz

Examine the layers of rock. identify and explain which layer contains the youngest fossils

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Biology, 11.10.2019 13:30, zayboogey04

I'll give you all the points that i have lefti wasn't there for this and i don't have 100 pennies xd it's so sadpre-lab informationpurpose to understand how relative dating and absolute dating are used to determine the age of rock layerstime approximately 60 minutesquestion how are relative and absolute dating methods used to determine the age of rocks and fossils? summary in this lab, you will examine examples of rock outcrops and determine the relative age of each layer, including the use of cross-cutting intrusions and index fossils. then, you will model radioactive decay by using pennies. finally, you will graph your results.safety§ behavior in the lab needs to be purposeful.§ report all accidents—no matter how big or small—to your teacher.lab procedurestep 1: gather materials.§ colored pencils§ 100 pennies§ box or container with lidstep 2: construct a geologic history of a region by determining the relative age of rock layers in different locations.a) examine the sample rock outcrops that follow and the key that accompanies the sample.b) remember that similar rock layers in different locations would be the same age.c) use the law of superposition to reconstruct the sequence of rock layers with the oldest layer at the bottom and the youngest at the top. use colored pencils to draw in the appropriate layers in table a in the data section.step 3: construct a geologic history of a region using index fossils.a) examine the sample rock outcrops with index fossils that follow and the key that accompanies the sample.b) use the index fossils to determine the proper relative age of the three rock columns.c) reconstruct the sequence of rock layers with the oldest layer at the bottom and the youngest layer at the top. use colored pencils to draw the appropriate layers in table b in the data section. include the index fossils in your drawings.d) use the index fossils to identify the geologic age during which certain layers formed.step 4: determine the relative age of each layer of a sample outcrop.a) examine the sample outcrop below.b) recall the definitions of cross-cutting and rock intrusion.c) record the rock layers from oldest to youngest in table c in the data section by writing the letter of each rock layer.step 5: model radioactive decaya) place 100 pennies in a box.b) gently shake the box.c) remove the lid and dump the pennies on your desk. be careful that no pennies fall on the floor.d) remove all the pennies that have the “heads” side facing up.e) record the number of pennies remaining after each shake in table d in the data section.f) repeat steps b, c, d, and e for 10 shakes or until no more pennies remain.step 6: graph and analyze the dataa) use table e in the data section to graph the results recorded in table d.step 7: clean up your area.a) return unused materials and dispose of any trash according to your teacher’s directions.datarecord your observations and data either in your lab notebook or in the space below.table a: rock layer relative agerock layer drawing (oldest at the bottom)table b: rock layer relative age with index fossilsrock layer drawinggeologic agetable c: relative dating with intrusionsrock layer label (oldest at the top)table d: radioactive decay modelshakenumber of pennies remaining010012345678910table e: graph of radioactive decay modeldirections: graph the results recorded in table d in the following graph.follow-up questionsanswer the following questions: 1. review your drawings of different rock layers. how were you able to determine the proper relative ages of rock layers? how did using index fossils determine relative age? 2. compare the penny activity to radioactive decay. in your model, what do the pennies represent? what does each shake of the box represent? 3. compare and contrast relative and absolute dating. how are they similar? how are they different? how is each useful in determining the age of rock layers? answer all questions! worth 70 !

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Be able to identify the youngest and oldest rock layers in a model that includes fossils...

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