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Earth's Interior

Brionna McZeal

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Across
4.the study of ancient magnetic fields
6.the boundary that separates the crust from the mantle
12.a gravity reading higher than the normal regional gravity
Down
1.an instrument used to measure the strength of Earth's magnetic field
2.a gravity reading lower than the normal regional gravity
3.the return of some of the energy of seismic waves to Earth's surface
5.the concept of vertical movement to reach equilibrium
7.the temperature increase with depth into Earth
8.the bending of seismic waves as they pass from one material to another
9.a change in Earth's magnetic field between normal polarity and reversed polarity
10.a useful tool for studying the crust and upper mantle
11.a balance or equilibrium of adjacent blocks of brittle lithosphere floating on the asthenosphere

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