I believe the answer is X.
This is true! Minerals were mined both on the surface as well as in mines and caverns underground.
<u>Full question:</u>
Which of the following is/are characteristic of the earth but not the moon? A. Molten core B. Plate tectonics C. Asteroid impacts D. Volcanoes
<u>Answer:</u>
Plate tectonics is characteristic of the earth but not the moon
<u>Explanation:</u>
Tectonic plate movements in Earth are forced by convection in the mantle-the hard mantle transits at rates of a some centimeters a year. The Moon’s mantle, too cool to travel easily, has no convection and no moving tectonic plate motions. More uncommon movements inside the Moon indicate fewer quakes. The few moonquakes that do happen are made fundamentally by gravitational tugs by Earth and Sun ).
The quantity and intensity (magnitude) of moonquakes is much less than the quantity and consequence of earthquakes. The feasible reason of this discrepancy is the Moon's smaller size and cooler interior. Earth is hot and active, manifested most dramatically in plate tectonics. The secret of plate tectonics is that the Earth has gaps between the continents, and so they can move around like a sliding block puzzle.
Nitrifying bacteria in the soil convert ammonia into nitrite (NO2-) and then into nitrate (NO3-<span>).</span>
