Which of the following best describes the composition of soil?
A) Soil consists of approximately 45% organic matter, 50% mineral matter, and 5% water and/or air.
B) Soil is composed of about 45% mineral matter, 5% organic matter, and 50% pore space containing air and water.
C) Soil includes pebbles, gravel, cobbles, and a varying combination of sands, silts, and clays.
D) Soil is primarily mineral matter (approximately 72%), but also consists of organic matter (10%), and water (18%).
B
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What are the four major dune types generally recognized? What will be an ideal response?
In what ways are the Sierra Nevada and the Andes similar?
What will be an ideal response?
The wetter, intercepting slope of a mountain is termed the ________ slope, whereas the drier, downwind slope is termed the ________ slope
A) left side; right side B) west side; east side C) windward; leeward D) leeward; windward
What is the source of black carbon aerosols?
A) Petroleum B) Soot C) Bacteria D) Mineral deposits