Exam 6: Weathering and Soil

________ weathering occurs when differences in resistance or environmental factors produce uneven surfaces on rocks.

________ are the primary source of organic matter in soils.

Decades ago, a brick factory used to be located along a river.Waste materials and faulty bricks were piled along the banks of the river, and some of them fell into the water.Years later, some of these materials were removed.The bricks were still recognizable as bricks, some with the manufacturer's mark clearly visible on the front, but the edges and corners were rounded over.Why were the edges and corners of the bricks so rounded over while the faces of the bricks were largely untouched?

Mature soils are characteristic of steep slopes.

Which soil horizon can hold more water due to the accumulation of fine clay particles?

During hydrolysis, ________ commonly decompose into clay minerals, silica, and soluble constituents.

Which of the following is a good soil conservation method to reduce the loss of topsoil on gentle slopes that are farmed?

In the process of hydration, the entire water molecule is added to the mineral structure, stretching the crystal lattice.Which type of weathering would this process describe: physical or chemical? Why?

How will joints in rock aid chemical weathering?

What is the most important agent of chemical weathering?

Why are tropical rainforest soils poor for farming?

Weathering is the transportation or removal of broken-down materials.

Which chemical weathering process is the primary method of weathering for feldspars?

Which climate contains the optimum environment for chemical weathering?

Which of the following rocks will be most resistant to weathering?

How are humans agents of weathering and erosion?

Which of the following regions has the least likelihood of experiencing weathering via salt crystal growth?

________ is a soil that has bedrock as its parent material.

________ is a soil that has unconsolidated sediment as its parent material.

The longer a soil has been forming, the ________ it becomes and the ________ it resembles the parent material.