\begin{tabular}{|l|c|c|}
\hline \multirow{2}{*}{Layer} & \multicolumn{2}{|c|}{Density (g/cm[tex]$^3$[/tex])} \\
\cline{2-3} & Top & Bottom \\
\hline Crust & 2.2 & 2.9 \\
\hline \begin{tabular}{l}
Upper \\
mantle
\end{tabular} & 3.4 & 4.4 \\
\hline \begin{tabular}{l}
Lower \\
mantle
\end{tabular} & 4.4 & 5.6 \\
\hline
\end{tabular}

You have learned that different types of rocks are found in Earth's layers. Their composition affects their densities.

What can you conclude based on the information in the table?

A. The rocks in the crust are the most dense.
B. The rocks in the upper mantle are the most dense.
C. The rocks in the lower mantle are the most dense.
D. The rocks in the core are the most dense.

Question

31-07-2024
Geography

Answered

\begin{tabular}{|l|c|c|}
\hline \multirow{2}{*}{Layer} & \multicolumn{2}{|c|}{Density (g/cm[tex]$^3$[/tex])} \\
\cline{2-3} & Top & Bottom \\
\hline Crust & 2.2 & 2.9 \\
\hline \begin{tabular}{l}
Upper \\
mantle
\end{tabular} & 3.4 & 4.4 \\
\hline \begin{tabular}{l}
Lower \\
mantle
\end{tabular} & 4.4 & 5.6 \\
\hline
\end{tabular}

You have learned that different types of rocks are found in Earth's layers. Their composition affects their densities.

What can you conclude based on the information in the table?

A. The rocks in the crust are the most dense.
B. The rocks in the upper mantle are the most dense.
C. The rocks in the lower mantle are the most dense.
D. The rocks in the core are the most dense.

Answer :

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GinnyAnswer GinnyAnswer · Answer 1 · 2024-07-31T13:31:07-04:00

To determine which layer of the Earth has the most dense rocks, we need to compare the densities at the bottom of each layer as provided in the table. The densities at the bottom of each layer are as follows:

- Bottom density of the Crust: 2.9 g/cm³
- Bottom density of the Upper Mantle: 4.4 g/cm³
- Bottom density of the Lower Mantle: 5.6 g/cm³

Now, we will compare these bottom densities to identify which one is the highest.

First, compare the bottom density of the Crust (2.9 g/cm³) with the bottom density of the Upper Mantle (4.4 g/cm³). Clearly, 4.4 g/cm³ is greater than 2.9 g/cm³.

Next, compare the bottom density of the Upper Mantle (4.4 g/cm³) with the bottom density of the Lower Mantle (5.6 g/cm³). Here, 5.6 g/cm³ is greater than 4.4 g/cm³.

Therefore, the bottom density of the Lower Mantle (5.6 g/cm³) is the highest among the densities given.

Based on this analysis, we conclude that the rocks in the lower mantle are the most dense.