What can color tell you about a soil?
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.
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The theory of continental drift was enthusiastically accepted in both the scientific and lay communities when proposed by Wegener.
a. true b. false
Explain why some Southeast Asian countries experienced sustained economic growth and social development, whereas others have more generally experienced stagnation in the same period?
What will be an ideal response?
The warmest temperature ever recorded in the United States occurred in Death Valley, CA
Indicate whether the statement is true or false
If an igneous rock is heated, which mineral melts first according to Bowen's reaction series?
A) Quartz B) Pyroxene C) Potassium feldspar D) Olivine