Question

answer questions based on the lab activity. throughout the reflection, make sure that you have the copy of the student guide, pdf or word and your data tables. complete the paragraph by using the drop-down menus. in this lab, you determined the relative ages of rock layers using the principles of relative dating. the dropdown says that a rock layer found closer to earth’s surface is dropdown a rock layer that is deeper in earth’s surface. the dropdown states that intrusions are dropdown the rock layer they cut across. you also determined the absolute ages of rock layers using a dropdown. the data you gathered helped you identify an unknown fossil.

Explanation:

To solve this, we recall principles of relative dating and absolute dating in geology (a subfield of Natural Science, specifically Earth Science which falls under Geography or Geology, but here we focus on the concepts):

First Drop - down (Principle for Rock Layers' Age by Depth)

The principle of superposition states that in undisturbed rock layers, the oldest layers are at the bottom (deeper) and younger layers are at the top (closer to the surface). So the first blank is "principle of superposition".

Second Drop - down (Comparison of Surface - Closer and Deeper Layers)

Based on superposition, a layer closer to the surface is younger than a deeper layer (since deeper layers were deposited earlier). So the second blank is "younger than".

Third Drop - down (Principle for Intrusions)

The principle of cross - cutting relationships states that an intrusion (like a magma intrusion) is younger than the rock layer it cuts across (because the rock layer had to exist first for the intrusion to cut through it). So the third blank is "principle of cross - cutting relationships".

Fourth Drop - down (Age of Intrusion Relative to Rock Layer)

From cross - cutting relationships, intrusions are younger than the rock layer they cut across. So the fourth blank is "younger than".

Fifth Drop - down (Method for Absolute Age)

To determine absolute ages of rock layers (and fossils), we use radioactive dating (or radiometric dating), which measures the decay of radioactive isotopes. So the fifth blank is "radioactive dating (or radiometric dating)".

If we assume the drop - down options include these terms, the completed paragraph would be:

In this lab, you determined the relative ages of rock layers using the principles of relative dating. The $\boldsymbol{\text{principle of superposition}}$ says that a rock layer found closer to Earth’s surface is $\boldsymbol{\text{younger than}}$ a rock layer that is deeper in Earth’s surface. The $\boldsymbol{\text{principle of cross - cutting relationships}}$ states that intrusions are $\boldsymbol{\text{younger than}}$ the rock layer they cut across. You also determined the absolute ages of rock layers using a $\boldsymbol{\text{radioactive dating (or radiometric dating)}}$. The data you gathered helped you identify an unknown fossil.

(Note: The exact wording in drop - downs may vary slightly, but these are the key geological principles and methods for relative and absolute dating.)

Answer:

To solve this, we recall principles of relative dating and absolute dating in geology (a subfield of Natural Science, specifically Earth Science which falls under Geography or Geology, but here we focus on the concepts):

First Drop - down (Principle for Rock Layers' Age by Depth)

The principle of superposition states that in undisturbed rock layers, the oldest layers are at the bottom (deeper) and younger layers are at the top (closer to the surface). So the first blank is "principle of superposition".

Second Drop - down (Comparison of Surface - Closer and Deeper Layers)

Based on superposition, a layer closer to the surface is younger than a deeper layer (since deeper layers were deposited earlier). So the second blank is "younger than".

Third Drop - down (Principle for Intrusions)

The principle of cross - cutting relationships states that an intrusion (like a magma intrusion) is younger than the rock layer it cuts across (because the rock layer had to exist first for the intrusion to cut through it). So the third blank is "principle of cross - cutting relationships".

Fourth Drop - down (Age of Intrusion Relative to Rock Layer)

From cross - cutting relationships, intrusions are younger than the rock layer they cut across. So the fourth blank is "younger than".

Fifth Drop - down (Method for Absolute Age)

To determine absolute ages of rock layers (and fossils), we use radioactive dating (or radiometric dating), which measures the decay of radioactive isotopes. So the fifth blank is "radioactive dating (or radiometric dating)".

If we assume the drop - down options include these terms, the completed paragraph would be:

In this lab, you determined the relative ages of rock layers using the principles of relative dating. The $\boldsymbol{\text{principle of superposition}}$ says that a rock layer found closer to Earth’s surface is $\boldsymbol{\text{younger than}}$ a rock layer that is deeper in Earth’s surface. The $\boldsymbol{\text{principle of cross - cutting relationships}}$ states that intrusions are $\boldsymbol{\text{younger than}}$ the rock layer they cut across. You also determined the absolute ages of rock layers using a $\boldsymbol{\text{radioactive dating (or radiometric dating)}}$. The data you gathered helped you identify an unknown fossil.

(Note: The exact wording in drop - downs may vary slightly, but these are the key geological principles and methods for relative and absolute dating.)