Weathering
mechanical weathering
Which is a major component of soil
humus (organic matter)
Deposition is when material is
How are the three groups of rocks classified?
How they were formed
What Are the 5 Layers of Soil?
O,A,B,C,R
Which is associated with mechanical weathering?
exfoliation
In a well-developed soil profile, which horizons are the top layers?
the A and O horizon
Which of the following is true of exfoliation
cracks a rock and breaks it off
How are sedimentary rocks formed?
From the layering of broken pieces of rocks
What is weathering?
The Breaking down of rocks
Which defines chemical weathering?
a rock that has been changed into one or more new compounds
Humus (if found) in which horizon
A
Why are wind, water, and gravity major agents of erosion rather than weathering
because erosion involves movement of Earth’s materials from one location to another
How are igneous rocks formed
From the cooling and hardening of magma
The mass of an object is 50 grams. The water level in a graduated cylinder starts at 100 mL. The object is put into the cylinder and the water level rises to 110 mL. What is the density of the object?
5
Chemical weathering occurs when minerals in rocks are changed chemically. Which of these will most likely change the rate of chemical weathering on a rock
. increase in rainfall amounts
what the soil composition is for sandy clay
40 percent clay, 50 percent sand, and 10 percent silt.
Wind erosion happens most often in what type of environment
oceans
In which of the following settings would a metamorphic rock most likely form?
8 kilometers below Earth’s surface
What is an example of living organisms causing weathering?
Tree seedlings growing and forming cracks in rocks
Water is a very important part of the physical weathering of rocks. Which of these properties of water is most important in causing some of the physical weathering of rocks?
Water expands when it freezes
what a soil is called if it has 30% clay, 40 % silt, and 30 % sand
clay loam
Which of the following is the best evidence that an area of land was once covered by a glacier
abrasion of surface rocks
the correct order of the processes responsible for the formation of sedimentary rocks?
weathering, erosion, deposition, compaction, cementation
A glacier can travel over the surface of Earth and reshape it. The chart describes three things a glacier can do.
Glacial Actions
1. breaks large rocks into smaller ones
2. pushes broken rocks ahead of itself
3. leaves broken rocks behind when the front edge melts
What are the 3 steps that must occur
weathering, erosion, deposition