To map Earth’s interior, geologists use a

To map Earth’s interior, geologists use a network of seismometers to chart seismic waves that originate in the earth’s crust and ricochet around its interior, most rapidly traveling through cold, dense regions and slower through hotter rocks.

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Section 9.6 Sentence Correction

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132. Almost like clone...
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135. Whereas in mammal...
136. A ruined structur...
137. By 1999, astronom...
138. Although she was ...
139. In no other histo...
140. Rock samples take...

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