Question

question 2
0.5 pts
seismic waves and holes drilled into earth are used to study earths interior. what is
the deepest subsurface unit we have sampled by drilling?
o the lower mantle
the upper core
the crust

Explanation:

Scientists study Earth's interior using seismic waves and drilling. Drilling has only sampled the crust. The lower mantle and upper core are too deep for current drilling technology. Drilling is limited by the extreme pressure and temperature in deeper layers.

Answer:

the crust