Where do the minerals from soil originally come from?
from weathered rockfrom windfrom plantsfrom animals3 points question 2what is the most important soil-forming factor at the early stages of soil formation?
humusparent materialfine grained materialssand, silt, or clay3 points question 3what is humus?
organic material present in soilparent material present in soilpercentage of the water in soilthe inorganic materials present in the soil3 points question 4what happens when there is more humus in the soil?
there is less nutrients present in the soil. there are more nutrients present in the soil. there are no minerals in the soil. the soil is not fertile.3 points question 5which of the following is a part of the process of animal decomposition in the soil? select all that apply.
microorganismsacids given off by decomposition which speed up the weathering processfunginutrients released from animal cells4 points question 6how does topography impact how much water soil receives?
the steeper the slope, the more water is held by the soil. the flatter the slop, the less water is held by the soil. the steeper the slope, the less water is held by the soil. topography does not impact the amount of water that can be held by soil.3 points question 7what impact will a cold, dry climate have on soil?
it will likely form soil very rapidly. it will likely form soil slower due to slower weathering rates. it will likely form soil faster than warm, wet environments. it will likely form soil at the same rate as a cold, wet climate.3 points question 8which of the following would most likely have the best developed soil?
deserts temperate forests tundra beaches

Mantle convection  is the slow  creepingmotion of earth's solid silicate  mantle  caused by  convection  currents carrying  heat from the interior  to the planet's surface.[1][2]  the earth's surface  lithosphere, which rides atop the  asthenosphere  (the two components of the  upper mantle), is divided into a number of  plates  that are continuously being created and consumed at their opposite  plate boundaries. accretion occurs as mantle is added to the growing edges of a plate, associated with  seafloor spreading. this hot added material cools down by  conduction  and  convection  of heat. at the consumption edges of the plate, the material has thermally contracted to become dense, and it sinks under its own weight in the process of  subduction  usually at an  ocean trench.[3]this subducted material sinks through the earth's interior. some subducted material appears to reach the lower mantle,[4]  while in other regions, this material is impeded from sinking further, possibly due to a phase transition from  spinel  to  silicate perovskiteand  magnesiowustite, an  endothermic reaction.[5]the subducted oceanic crust triggers  volcanism, although the basic mechanisms are varied. volcanism may occur due to processes that add buoyancy to partially melted mantle causing an upward flow due to a decrease in density of the partial melt.secondary forms of convection that may result in surface volcanism are postulated to occur as a consequence of intraplate extension[6]  and  mantle plumes.[7]it is because the mantle can convect that the  tectonic plates  are able to move around the earth's surface.[8]mantle convection seems to have been much more active during the  hadean  period, resulting in gravitational sorting of heavier molten  iron, and  nickel  elements and  sulphides  in the core, and lighter  silicate minerals  in the  mantle.

Ithink its false. hope this : )

Im not sure if you still need this but the answer is 300 hz450 hz  i just did this lesson so , wish you the best of luck and take care