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Author Question: In the healthy environment of a sustainable soil, A) the levels of humus steadily decline, but ... (Read 70 times)

kfurse

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on: Jul 16, 2018
In the healthy environment of a sustainable soil,
 
  A) the levels of humus steadily decline, but the aeration increases.
  B) sandy or silty soils are steadily converted to clay soils.
  C) abundant populations of bacteria are steadily replaced by mycorrhizae.
  D) the humus-forming processes of topsoil is renewed by the addition of detritus and humus.

Question 2

Match the sphere of the Earth with the correct definition.
 
  A) Gaseous envelope around the planet
  B) The solid Earth
  C) Water portion of the planet
  D) All life on the planet
 
  1) Hydrosphere
  2) Biosphere
  3) Atmosphere
  4) Geosphere


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ricroger

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Reply #1 on: Jul 16, 2018
Answer to Question 1

D

Answer to Question 2

Answers: 1) C 2) D 3) A 4) B


kfurse

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Reply 2 on: Jul 16, 2018
Gracias!

diana chang

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Reply 3 on: Yesterday
Excellent

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