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Soil And Soil Conservation
Test Description: Review of how soil is formed and ways it can be conserved
Instructions: Answer all questions to get your test result.
1) A soil profile is divided into sections called
A
bands
B
horizons
C
strata
D
layers
2) A sloping piece of land that has had flat areas like steps built on it so that people can grow crops there
A
conservation plowing
B
terracing
C
contour plowing
D
no-till farming
3) When farmers plow along the curve of the land
A
conservation plowing
B
contour plowing
C
terracing
D
no-till farming
4) Strip mining , removal of soil and rock above a seam of mining material such as coal followed by the removal of the exposed mining material...
A
does not disturb the soil at Earth's surface
B
removes soil from the Earth's surface
C
adds soil to Earth's surface
D
prevents erosion
5) Why is it easy for the wind and rain to erode the soil after a farmer has removed the plants from his fields?
A
tractor tires will hold water and wind can blow the water out of the tire tracks
B
there will be no roots to hold the soil in place and the wind can blow it away
C
the soil will be loosely packed and rain can soak into the soil
D
the soil will pack tightly together and wind can blow it away
6) The Dust Bowl of the 1930s was a result of poor farming practices and
A
severe drought followed by plowing the land
B
severe drought followed by rain
C
severe drought followed by strong winds
D
the severe drying and plowing of the land followed by torrential flooding
7) The layer of soil with the most humus is
A
O horizon
B
topsoil
C
subsoil
D
C horizon
8) Humus is mainly made up of
A
remains of plants and animals
B
water
C
sand and silt
D
rocks
9) Which geologic process is most responsible for soil formation?
A
cementation
B
weathering
C
erosion
D
sedimentation
10) Why is humus an important part of soil?
A
It contains nutrients, which feed plants
B
It contains rocks, which strengthen the soil
C
it provides nutrients for decomposers
D
it contains chemicals, which fight disease
11) Soil is composed mainly of which ingredients?
A
water, air, sand, mud, shells
B
air, rock pieces, decayed organic matter, water, minerals
C
worms, minerals, shells, air, rock pieces
D
rock pieces, mud, decayed organic matter, minerals
12) Rose writes a list of materials that make up soil, but she cannot remember the last material to finish the list. Her list is: 1-air 2-rock pieces, 3-minerals, 4-organic matter, 5-?. What is the material that would best complete her list?
A
bedrock
B
water
C
shells
D
pH
13) Soil is important because it provides
A
nutrients for plants
B
all listed
C
storage for water
D
housing for animals
14) What is the role of decomposers in soil?
A
burrow deep in the soil
B
make space for air and water
C
store moisture
D
break down and digest dead organisms
15) Brock grabs a topsoil sample in his hand. He rolls it into a ball. The soil feels gritty and the ball falls apart. What part of the topsoil most likely made it feel gritty?
A
humus
B
clay
C
silt
D
sand
16) Which of the following best describes soil erosion?
A
the improvement of soil
B
breakdown of soil
C
the movement of soil by wind or water
D
the addition of soil
17) When plants, animals, and other organisms die, they beak down and become part of the soil. This part of the soil is called
A
sand
B
silt
C
humus
D
loam
18) Brady digs a small hole in the soil and the next day it rains. Brady observes the hole has filled with water, but does not empty even after several sunny days. How can this be explained?
A
the soil was mostly loam
B
the soil was mostly humus
C
the soil was mostly clay
D
the soil was mostly sand
19) Why do plants not grow well in sandy soil?
A
air cannot pass through sandy soil
B
sandy soil cannot hold enough water
C
sandy soil has too many nutrients
D
roots cannot push through sandy soil
20) Which layer of soil is responsible for the formation of all the other layers?
A
topsoil
B
subsoil
C
bedrock
D
litter
*select an answer for all questions
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