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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
horizons
B
layers
C
strata
D
bands
2) A sloping piece of land that has had flat areas like steps built on it so that people can grow crops there
A
terracing
B
no-till farming
C
conservation plowing
D
contour plowing
3) When farmers plow along the curve of the land
A
conservation plowing
B
no-till farming
C
terracing
D
contour plowing
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
removes soil from the Earth's surface
B
does not disturb the soil at 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
the soil will pack tightly together and wind can blow it away
C
there will be no roots to hold the soil in place and the wind can blow it away
D
the soil will be loosely packed and rain can soak into the soil
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
C horizon
B
O horizon
C
subsoil
D
topsoil
8) Humus is mainly made up of
A
sand and silt
B
rocks
C
remains of plants and animals
D
water
9) Which geologic process is most responsible for soil formation?
A
weathering
B
cementation
C
sedimentation
D
erosion
10) Why is humus an important part of soil?
A
It contains rocks, which strengthen the soil
B
it provides nutrients for decomposers
C
It contains nutrients, which feed plants
D
it contains chemicals, which fight disease
11) Soil is composed mainly of which ingredients?
A
air, rock pieces, decayed organic matter, water, minerals
B
water, air, sand, mud, shells
C
rock pieces, mud, decayed organic matter, minerals
D
worms, minerals, shells, air, rock pieces
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
shells
B
bedrock
C
water
D
pH
13) Soil is important because it provides
A
all listed
B
nutrients for plants
C
housing for animals
D
storage for water
14) What is the role of decomposers in soil?
A
break down and digest dead organisms
B
burrow deep in the soil
C
store moisture
D
make space for air and water
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
sand
C
clay
D
silt
16) Which of the following best describes soil erosion?
A
the addition of soil
B
the improvement of soil
C
breakdown of soil
D
the movement of soil by wind or water
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
loam
B
silt
C
sand
D
humus
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 clay
B
the soil was mostly loam
C
the soil was mostly sand
D
the soil was mostly humus
19) Why do plants not grow well in sandy soil?
A
roots cannot push through sandy soil
B
sandy soil cannot hold enough water
C
air cannot pass through sandy soil
D
sandy soil has too many nutrients
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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