Term
What is mechanical weathering ? |
|
Definition
when physical forces break rock into smaller and smaller pieces without changing the rocks mineral composition |
|
|
Term
|
Definition
when water freezes and expands it enlarges the cracks after many freeze thaw cycles the rocks break into pieces |
|
|
Term
when water freezes its volume __ |
|
Definition
|
|
Term
Which of the following is NOT associated with mechanical weathering ? |
|
Definition
|
|
Term
What is chemical weathering ? |
|
Definition
Is the transformation of rock into one or more new compounds |
|
|
Term
Which of the following is the result of chemical weathering? |
|
Definition
a rock that has been changed into one or more new compounds |
|
|
Term
The atmospheric gas that forms a mild acid when dissolved in water is ? |
|
Definition
|
|
Term
What would cause the inscription on a marble gravestone to become harder and harder to read over time ? |
|
Definition
|
|
Term
What climate does chemical weather favor the most ? |
|
Definition
|
|
Term
What are major components of soil ? |
|
Definition
mineral matter,organic matter,water,and air |
|
|
Term
A soils texture is determined by ? |
|
Definition
You use categories of clay,silt,and sand in the soil |
|
|
Term
The main source of organic matter in soil is ? |
|
Definition
|
|
Term
A soil associated with the hot and wet tropics is ? |
|
Definition
|
|
Term
Pedalfer soils contain high amounts of ? |
|
Definition
iron oxide and aluminum-rich clays |
|
|
Term
The process responsible for moving material down slope under the influence of gravity is ? |
|
Definition
|
|
Term
What is the force behind mass movement ? |
|
Definition
|
|
Term
A mass movement that involves the sudden movement of a block of material along a flat inclined surface is called a ? |
|
Definition
|
|
Term
Which of these factors affects the rate of weathering ? |
|
Definition
climate,chemical composition,of the exposed rock,surface area of the exposed rock |
|
|
Term
Use figure 5-1 to determine what soil is called if it has 20% clay,60% silt,and 20% sand ? |
|
Definition
|
|
Term
What are proportions of clay,silt,and sand shown at point B in figure 5-1 ? |
|
Definition
Clay 20%,silt 40%,sand 40% |
|
|
Term
What are proportions of clay,silt,and sand shown at point A in figure 5-1 ? |
|
Definition
clay 60%,silt 20%,sand 20% |
|
|
Term
What are proportions of clay,silt,and sand shown at point C in figure 5-1 ? |
|
Definition
clay 10%,silt 20%,sand 70% |
|
|
Term
Why can the removal of vegetation trigger mass movements ? |
|
Definition
the pant roots bind the soil and regolith roots |
|
|
Term
In the process of _______,water freezes and expands,enlarging cracks in rocks |
|
Definition
|
|
Term
A large pile of debris that forms at the base of a slope is called ? |
|
Definition
|
|
Term
What is the most important agent of chemical weathering ? |
|
Definition
|
|
Term
|
Definition
Layer of rock and mineral fragments which covers nearly all of the Earths land surface |
|
|
Term
The force that drives mass movements is ? |
|
Definition
|
|
Term
What is the content in the soil type Pedocal ? |
|
Definition
Abundant calcite or calcium carbonate and are typically light grey-brown |
|
|
Term
What is the location and content of the soil type Latrite ? |
|
Definition
Found in hot wet tropical areas.Iron oxides and aluminum oxides are present |
|
|
Term
One of the most dramatic triggers of sudden mass movements is an ? |
|
Definition
|
|
Term
_____the slowest type of mass movements involves the lifting and contracting of soil particles over time ? |
|
Definition
|
|
Term
What are the three factors that affect the rate of weathering ? |
|
Definition
Mechanical weathering,rock characteristics,and climate |
|
|
Term
How are soils classified based on texture ? |
|
Definition
You use percentages of clay,silt,and sand |
|
|
Term
Explain the three processes that break rocks into smaller pieces during mechanical weathering ? |
|
Definition
Frost wedging,unloading.and biological activity |
|
|