which soil horizon has very little organic matter and accumulates soluble metals and nutrients that are transported from other soil layers?

The mantle is made up of which structural zones?

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.

Quais são as consequencias (positivas e negativas) da extração dos minerais metálicos