Author Question: Equilibrium in most natural Earth subsystems generally means: a. the factors in a system are in a ... (Read 19 times)

TVarnum · **on:** Aug 7, 2018

Equilibrium in most natural Earth subsystems generally means:
a. the factors in a system are in a static balance.
b. interrelated factors in a system are in a state of continual adjustment to each other.
c. that all factors in a system are equally important to the way that the system functions.
d. none of these

Question 2

What can color tell you about a soil?

tashiedavis420 · **Reply #1 on:** Aug 7, 2018

Answer to Question 1

B

Answer to Question 2

A soil's color is typically related to its physical and chemical characteristics. If the humus content is low because of limited organic activity or loss of organics through leaching, soil colors typically are light brown or gray. Decomposed organic matter is black or brown, so soils rich in humus tend to be dark. Red or yellow soils typically indicate the presence of iron. In moist climates, a light gray or white soil indicates that iron has been leached out, leaving oxides of silicon and aluminum, but in dry climates, the same color typically indicates an accumulation of calcium or salts.