Discuss two ways in which desert pavement could form over time
What will be an ideal response?
Answer: Scenario A could involve the removal of fine-grained sediments (silt and sand) from the surface by deflation. The concentration of larger, coarse-grained particles increases until the fine-grained sediments are completely removed. Scenario B might involve fine-grained particles sifting and working their way between open pore spaces by wind and rainwater infiltration. Over time, silt continues to accumulate and lifts the coarser particles, creating desert pavement.
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Which of the following terms encompasses all of the others?
a. natural capital b. natural resources c. natural services d. renewable resources e. nonrenewable resources
Carcinogens cause
a. genetic defects b. birth defects c. Cancer d. chronic health effects e. allergic reactions
In a temperature inversion
A. warm air overlies cold air B. cold air overlies warm air C. clouds cover the ground D. fog forms
Folded U-shaped structures with the youngest layer in the center are called __________
a) basins b) domes c) monoclines d) anticlines e) synclines