May 26, 2016 · Lichens play a special role in chemical weathering by weakening the hydrogen bond in water, making it more effective at dissolving rocks with high quartz concentrations. slowing the rate of jointing in rocks. acting as a catalyst for dissolution of minerals that crystallize at the highest temperatures. → secreting oxalic acid, which dissolves carbonates particularly …
See Page 1. True False. Question 17 1 / 1 pts Chemical weathering would be most effective _____. in a cold, dry climate in a warm, humid climate equally in any kind of climate in a warm, dry climate. Question 18 1 / 1 pts The single most characteristic feature of sedimentary rocks are strata or beds. False True.
Also, Heat and moisture can speed chemical reactions; thus, chemical weathering is most active in moist, warm climates, whereas mechanical weathering is more active in cold, dry climates. The effectiveness of weathering also depends on the type of rock, the steepness of the slope, amount of biological activity, and the time over which weathering processes have operated.
View Quiz 5.docx from GSCI 100 at Fort Hays State University. Quiz 5 - 75 out of 75 points – Score 100% QUESTION 1 Chemical weathering would be most effective _. in …
20. Climate influences not only the rate of weathering but the type of native vegetation dominant in an area.
Soils in the Oxisols order are deeply weathered and have deep subsurface horizons of calcium oxides. a. True
Histosols generally have higher organic matter contents than Mollisols.
Select the appropriate epipedon: A mineral horizon that is very black in color due to its high organic matter content. Soil developed from volcanic ash.
Forests would typically have more organic accumulation than grasslands.
Select the appropriate subsurface diagnostic horizon: Found mostly in humid tropical and subtropical regions that result in highly weathered soils and very high accumulations of Fe and Al oxides. Contain 10% or less of primary, weatherable minerals.
The C horizon is generally more weathered than the A horizon.