Soil is formed slowly through the weathering of materials called ___.
Bedrock or parent material
Magma and lava
organic matter
leaves and litter
4. Multiple Choice
20 seconds
1 pt
What are the two types of weathering?
Rain and Snow
Precipitation and Temperature
Physical and Chemical
Metal and Nonmetal
5. Multiple Choice
30 seconds
1 pt
Large rocks fall from mountainsides
Chemical weathering
Mechanical weathering
6. Multiple Choice
20 seconds
1 pt
Formed by sulfur and nitrogen compounds will cause rocks to fall apart
hydration
carbonation
oxidation
acids
7. Multiple Choice
20 seconds
1 pt
Water (usually from powerful waves) rushes into cracks in rocks; but a tiny bit of air is compressed at the crevice of the crack;
hydration
hydraulic action
extreme flooding
oxidation
8. Multiple Choice
30 seconds
1 pt
Especially in deserts, rocks heat up in the day and, as the temperature drops greatly at night, the rocks can flake easily (exfoliate).
hydraulic action
gravity
freeze/thaw
hydration
9. Multiple Choice
20 seconds
1 pt
What's in that soil? If the soil is red or yellow it must have __ in it.
helium
oxidized iron
carbon
organic matter
10. Multiple Choice
30 seconds
1 pt
Mosses and lichens attach to rocks and this causes physical as well as chemical breakdown of the rock.
organic activity
decomposition
oxidation
carbonation
11. Multiple Choice
30 seconds
1 pt
Name that layer! Layer where soil accumulates (holds) nutrients such as nitrogen and phosphorus.
Topsoil
Subsoil
Bedrock
Transition Zone
12. Multiple Choice
30 seconds
1 pt
Name that layer! This is where minerals, materials, and substances move along with water through the soil, deeper into the ground (leaching).
O
E
B
R
13. Multiple Choice
20 seconds
1 pt
Name that layer! Very dense layer; the color of this layer depends on the color of the bedrock.
C
R
O
A
14. Multiple Choice
20 seconds
1 pt
Name that layer! A mix of leaf litter and humus occupy this soil layer.
O
A
E
B
15. Multiple Choice
20 seconds
1 pt
The tool we use to identify soil based on percentages of silt, sand and clay.
Soil Texture Triangle
Soil Texture Square
Chromotography
An expensive filtration system
16. Multiple Choice
30 seconds
1 pt
What's in that soil? If the color of soil is light colored it is most likely part of the __ layer in the soil profile.
A
O
E
C
17. Multiple Choice
1 minute
1 pt
The layer of soil which the topsoil is found.
Horizon A
Horizon B
Horizon C
Horizon D or R
18. Multiple Choice
30 seconds
1 pt
Layers of soil are also known as:
Soil Profiles
Soil Horizons
Soil sheets
Soil cores
19. Multiple Choice
2 minutes
1 pt
In which layer of the soil profile contains the MOST humus?
Layer 1
Layer 2
Layer 3
Layer 4
20. Multiple Choice
1 minute
1 pt
Which of the following is NOT one of the three types of soil?
clay
sand
silt
mud
21. Multiple Choice
45 seconds
1 pt
Which of the following is the largest particle in soil?
sand
silt
humus
clay
22. Multiple Choice
3 minutes
1 pt
You dig a small hole in the soil and the next day it rains. The hole fills with water, but does not empty even after several days of dry weather. What is the soil mostly made of?
clay
sand
humus
silt
23. Multiple Choice
30 seconds
1 pt
In which horizon of soil profile does leaching normally occur?